New Drug Approvals

Home » cancer » IMATINIB




Read all about Organic Spectroscopy on ORGANIC SPECTROSCOPY INTERNATIONAL 


Recent Posts

Blog Stats

  • 3,949,201 hits

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 2,725 other followers

add to any





CAS No:- [152459-95-5]

IUPAC Name:- 4-[(4-Methyl-1-piperazinyl)methyl]-N-[4-methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl]amino]phenyl]benzamide

M. P.:- 211-213 °C

MW: 493.604





Imatinib (INN), marketed by Novartis as Gleevec (Canada, South Africa and the USA) or Glivec (Australia, Europe and Latin America), and sometimes referred to by its investigational name STI-571, is a tyrosine-kinase inhibitor used in the treatment of multiple cancers, most notably Philadelphia chromosome-positive (Ph+) chronic myelogenous leukemia (CML).[1]

Like all tyrosine-kinase inhibitors, imatinib works by preventing a tyrosine kinase enzyme, in this case BCR-Abl, fromphosphorylating subsequent proteins and initiating the signalling cascade necessary for cancer growth and survival, thus preventing the growth of cancer cells and leading to their death by apoptosis.[2] Because the BCR-Abl tyrosine kinase enzyme exists only in cancer cells and not in healthy cells, imatinib works as a form of targeted therapy—only cancer cells are killed through the drug’s action.[3] In this regard, imatinib was one of the first cancer therapies to show the potential for such targeted action, and is often cited as a paradigm for research in cancer therapeutics.[4]

Imatinib has been cited as the first of the exceptionally expensive cancer drugs, costing $92,000 a year. Doctors and patients complain that this is excessive, given that its development costs have been recovered many times over, and that the costs of synthesizing the drug are orders of magnitude lower. In the USA, the patent protecting the active principle will expire on 4 January 2015 while the patent protecting the beta crystal form of the active principal ingredient will expire on 23 May 2019.[5]

The developers of imatinib were awarded the Lasker Award in 2009 and the Japan Prize in 2012.[6][7]

bcr-abl kinase (green), which causes CML, inhibited by imatinib (red; small molecule).

Medical uses

Imatinib is used to treat chronic myelogenous leukemia (CML), gastrointestinal stromal tumors (GISTs) and a number of othermalignancies.

Chronic myelogenous leukemia

The U.S. Food and Drug Administration (FDA) has approved imatinib as first-line treatment for Philadelphia chromosome-positive CML, both in adults and children. The drug is approved in multiple Philadelphia chromosome-positive cases of CML, including after stem cell transplant, in blast crisis, and newly diagnosed.[8]

Gastrointestinal stromal tumors

The FDA first granted approval for advanced GIST patients in 2002. On 1 February 2012, imatinib was approved for use after the surgical removal of KIT-positive tumors to help prevent recurrence.[9] The drug is also approved in unresectable KIT-positive GISTs.[8]


The FDA has approved imatinib for use in adult patients with relapsed or refractory Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL), myelodysplastic/ myeloproliferative diseases associated with platelet-derived growth factor receptor gene rearrangements, aggressive systemic mastocytosis without or an unknown D816V c-KIT mutation, hypereosinophilic syndrome and/or chronic eosinophilic leukemia who have the FIP1L1-PDGFRα fusion kinase (CHIC2 allele deletion) or FIP1L1-PDGFRα fusion kinase negative or unknown, unresectable, recurrent and/or metastaticdermatofibrosarcoma protuberans.[8] On 25 January 2013, Gleevec was approved for use in children with Ph+ ALL.[10]

For treatment of progressive plexiform neurofibromas associated with neurofibromatosis type I, early research has shown potential for using the c-KIT tyrosine kinase blocking properties of imatinib.[11][12][13][14]

Legal challenge to generics

In 2007, imatinib became a test case through which Novartis challenged India’s patent laws. A win for Novartis would make it harder for Indian companies to produce generic versions of drugs still manufactured under patent elsewhere in the world. Doctors Without Borders argues a change in law would make it impossible for Indian companies to produce cheap generic antiretrovirals (anti-HIV medication), thus making it impossible for Third World countries to buy these essential medicines.[43] On 6 August 2007, the Madras High Court dismissed the writ petition filed by Novartis challenging the constitutionality of Section 3(d) of Indian Patent Act, and deferred to the World Trade Organization (WTO) forum to resolve the TRIPS compliance question. As of 2009 India has refused to grant patent exclusivity..

On April 01, 2013 Supreme Court of India dismissed the plea of Novartis for the grant of patent.

in germany

Mechanism of action

Mechanism of action of imatinib
Drug mechanism

Crystallographic structure of tyrosine-protein kinase ABL (rainbow colored, N-terminus = blue, C-terminus = red) complexed with imatinib (spheres, carbon = white, oxygen = red, nitrogen = blue).[31]
Therapeutic use chronic myelogenous leukemia
Biological target ABL, c-kit, PDGF-R
Mechanism of action Tyrosine-kinase inhibitor
External links
ATC code L01XE01
PDB ligand id STI: PDBe, RCSB PDB

Imatinib is a 2-phenyl amino pyrimidine derivative that functions as a specific inhibitor of a number of tyrosine kinase enzymes. It occupies the TK active site, leading to a decrease in activity.

There are a large number of TK enzymes in the body, including the insulin receptor. Imatinib is specific for the TK domain inabl(the Abelson proto-oncogene), c-kit and PDGF-R (platelet-derived growth factorreceptor).

In chronic myelogenous leukemia, the Philadelphia chromosome leads to a fusion protein of abl with bcr(breakpoint cluster region), termed bcr-abl. As this is now aconstitutively active tyrosine kinase, imatinib is used to decrease bcr-abl activity.

The active sites of tyrosine kinases each have a binding site for ATP. The enzymatic activity catalyzed by a tyrosine kinase is the transfer of the terminal phosphate from ATP to tyrosine residues on its substrates, a process known as protein tyrosinephosphorylation. Imatinib works by binding close to the ATP binding site of bcr-abl, locking it in a closed or self-inhibited conformation, and therefore inhibiting the enzyme activity of the protein semi-competitively.[32] This fact explains why many BCR-ABL mutations can cause resistance to imatinib by shifting its equilibrium toward the open or active conformation.[33]

Imatinib is quite selective for bcr-abl – it does also inhibit other targets mentioned above (c-kit and PDGF-R), but no other knowntyrosine kinases. Imatinib also inhibits the abl protein of non-cancer cells but cells normally have additional redundant tyrosine kinases which allow them to continue to function even if abl tyrosine kinase is inhibited. Some tumor cells, however, have a dependence on bcr-abl.[34] Inhibition of the bcr-abl tyrosine kinase also stimulates its entry in to the nucleus, where it is unable to perform any of its normal anti-apoptopic functions.[35]

The Bcr-Abl pathway has many downstream pathways including the Ras/MapK pathway, which leads to increased proliferation due to increased growth factor-independent cell growth. It also affects the Src/Pax/Fak/Rac pathway. This affects the cytoskeleton, which leads to increased cell motility and decreased adhesion. The PI/PI3K/AKT/BCL-2 pathway is also affected. BCL-2 is responsible for keeping the mitochondria stable; this suppresses cell death by apoptosis and increases survival. The last pathway that Bcr-Abl affects is the JAK/STAT pathway, which is responsible for proliferation.[36]



Imatinib is known as an inhibitor of protein-tyrosine kinase and is indicated for the treatment of chronic myeloid leukemia (CML). Imatinib also has potential for the treatment of various other cancers that express these kinase including acute lymphocyte leukemia and certain solid tumors. It can also be used for the treatment of atherosclerosis, thrombosis, restenosis, or fibrosis. Thus, imatinib can also be used for the treatment of non-malignant diseases. Imatinib is usually administered orally in the form of a suitable salt, e.g., in the form of imatinib mesylate.

The chemical name of Imatinib is 4-(4-methyl piperazine -1- methyl) -N-4-methyl-3-[4- (3- pyridyl) pyrimidine-2-amino] – benzamide and is represented by the following structural formula:

Figure imgf000003_0001


Imatinib Mesylate is an inhibitor of signal transduction (STI571) invented by Novartis AG after 7 years of hard work; it is the first inhibitor of cancer signal transduction ratified in the whole world. It is sold by Novartis as Gleevec capsules containing imatinib mesylate in amounts equivalent to 100 mg or 400 mg of imatinib free base.

Imatinib Mesylate is the rare drug in America, European Union and Japan. In May 10, 2001, it was ratified by American Food and Drug Administration (FDA) to treat the chronic myelogenous leukemia patients. EP0564409 (US5521 184) describes the process for the preparation of imatinib and the use thereof, especially as an anti tumour agent.

There are generally two synthetic routes for synthesis of Imatinib, suitable for the industrial production. One synthetic process as described in scheme-I comprises using 2-methyl-5-nitroaniline as the raw material which is reacted with cyanamide to obtain guanidine; cyclization reaction with 3-dimethylamino-l-(3-pyridyl)-2-propylene-l- ketone; reduction step of nitro to amine and condensation reaction with 4- (Chloromethyl)benzoyl chloride and N-methylpiperazidine to obtain Imatinib (WO 2004/108669). -I

Figure imgf000004_0001

Scheme-2 describes the successful process for the synthesis of Imatinib using 4-methyl-3- nitroanilines as the raw material, comprising reacting 4-methyl-3-nitroanilines with 4- (Chloromethyl)benzoyl chloride and N-methyl piperazidine in turns; followed by reduction of nitro group to amino group; then reaction with cyanamide to obtain guanidine; finally cyclization reaction with 3- dimethyl amino- 1 -(3- pyridyl)-2- propylene-1 -ketone to obtain Imatinib (WO 03/066613). The said PCT application discloses the use of 4-4-(methyl piperazin-l-ylmethyl)-benzoic acid methyl ester as one of the raw material but rest of the reactants are different from that of N-(5-amino -2- methylphenyl)-4-(3-pyridyl)-2-pyrimidine amine in presence of trimethyl aluminium.


Figure imgf000005_0001

Common feature of the processes for preparing imatinib according to (WO 2004/108669) and (WO03/066613) lies in use of cyanamide as a reagent. The main difference between the two routes is that the reaction sequence of cyclization of pyrimidine chain is different. Example 10 of PCT International Publication no. WO 2003/066613 is less applicable to industrial purposes. These include the reaction between N-(3-bromo-4-methyl-phenyl)-4- (4-methyl-piperazin-l -ylmethyl)-benzamide and 4-(3-pyridyl)-2-pyrimidineamine which uses a mixture of rac-BINAP (a phosphine oxide catalyst) and Pd2 (dba)3*CHCl3. These catalysts are very expensive, therefore, their use is unfit for commercial production.

CN1630648A describes a process comprising reaction of 3- bromine-4- methyl aniline with 4-(4-methyl-piperazin- methyl) methyl benzoate in presence of trimethyl-Aluminum to obtain N-(4-methyl-3-bromobenzene)-4-(4-methyl-piperazin- 1 -methyl)-benzamide, which further reacts with 2-amino-4-(3-pyridyl)- pyrimidine in presence of palladium as catalyst to obtain Imatinib.

Figure imgf000006_0001
Figure imgf000006_0002

The drawback of the above process is the use of trimethyl-Aluminum, which is flammable and reacts severely when comes in contact with water.

CN101016293A describes another process using N-(4-methyl-3-3- aminophenyl)-4-(4- methyl-piperazin-1 -methyl)- benzamide as the raw material. The said raw material is reacted with 2-halogen-4-(3-pyridyl)- pyrimidine to obtain Imatinib.

Figure imgf000006_0003

The process disclosed in CN 101016293 A comprises use of halogenated agent, such as phosphorus oxychloride, which is used to synthesize 2-halogeno-4- methyl- (3-pyridyl) – pyridine is lachrymator and corrosive and has great influence to the surroundings. EP0564409 describes a coupling reaction between N-(5-amino -2-methylphenyl)-4-(3- pyridyl)-2-pyrimidine amine and 4-(4-methyl piperazin-l-ylmethyl)-benzoyl chloride in the presence of high quantity of pyridine to starting reactant amine N-(5-amino -2- methylphenyl)-4-(3-pyridyl)-2-pyrimidine amine. The ratio of the pyridine to the said reactant is 138 which is equivalent to about 40 parts v/w. Use of such a large quantity of pyridine is unsafe as it is a toxic solvent according to ICH guidelines. The workup of the reaction comprises evaporation of the remaining pyridine and further processing, which finally involves chromatography for purification, which is highly undesirable on industrial scale because it is expensive and time consuming.

Figure imgf000007_0001

US2006/0149061 and US20060223817 also discloses a similar synthetic approach comprising the use of similar pyridine /starting amine ratio (140 equivalents which is equals about 41 parts v/w). The product obtained is purified by slurring in ethyl acetate.

WO2004/074502 describes a coupling reaction between N-(5-amino -2-methylphenyl)-4- (3-pyridyl)-2-pyrimidine amine and 4-(4-methyl piperazin-l-ylmethyl)-benzoyl chloride wherein solvent like dimethyl pharmamide , dimethyl acetamide, N-methyl pyrilidinone are used as solvents instead of pyridine. However the method described in this patent application lacks an advantage in that the coupling reaction produces the hydrohalide salt of imatinib, e.g. imatinib trihydrochloride monohydrate, which has to be treated with a base in order to afford the imatinib base, thus an extra step is required. Further, conventional methods for coupling N-(5-amino -2-methylphenyl)-4-(3-pyridyl)-2- pyrimidine amine require reaction with an acid halide, e.g. 4-(4-methyl piperazin-1- ylmethyl)-benzoyl chloride, which requires an additional production step that can involve harsh and/or toxic chlorinating agent.

Figure imgf000008_0001

WO2008/1 17298 describes a coupling reaction between N-(5-amino -2-methylphenyl)-4- (3-pyridyl)-2-pyrimidine amine and 4-(4-methyl piperazin-l-ylmethyl)-benzoyl chloride in presence of a base selected from potassium carbonate, sodium carbonate, potassium or sodium hydroxide. Use of potassium carbonate as base results into the formation of Imatinib dihydrochloride which ultimately requires an additional operation of neutralization by using excessive base to get imatinib.

Figure imgf000008_0002

WO2008/136010 describes a coupling reaction between N-(5-amino -2-methylphenyl)-4- (3-pyridyl)-2-pyrimidine amine and 4-(4-methyl piperazin-l-ylmethyl)-benzoyl chloride in presence of base potassium hydroxide resulting into 78.6% yield of crude imatinib base. Preparation of crude requires imatinib hydrochloride preparation during the workup which is then basified to get base in crude form. This also describes maleate salt preparation as mode of purification which is again basified to give pure Imatinib base.

Figure imgf000009_0001

US patent application 2004/0248918 discloses a different approach using N-(5-amino -2- methylphenyl)-4-(3-pyridyl)-2-pyrimidine amine and 4-(2-chloromethyl)-benzoyl chloride as raw material. The reaction for the preparation of Imatinib is carried out in tetrahydrofuran as a reaction solvent and in the presence of pyridine as a base. However the method described in this patent application lacks an advantage as purification of the product requires column chromatography using chloroform: methanol (3: 1 v/v), which is not suitable purification method when performing the reaction on large scale, followed by crystallizati

Figure imgf000009_0002

US patent application 2008/0103305 discloses a process comprising reacting N-(5-amino -2-methylphenyl)-4-(3-pyridyl)-2-pyrimidine amine or its alkyl derivative and an acid salt of 4-[(4-methyl-l-piperazinyl)-methyl] benzoyl derivative as given below in the scheme-3 using pyridine in an amount of about 2 to 10 volumes per gram of the said amine. However the drawback associated with this process is use of pyridine especially when reaction is performed on large scale. -3

Figure imgf000010_0001



Anticancer drug imatinib mesylate (Imatinib <wbr> Mesylate)

Inverse synthetic analysis will be divided into four imatinib into fragment A has 1,3 – parents electrical, fragment B are 1,3 – parent nuclear, fragments A and B constitute a pyrimidine ring.

Anticancer drug imatinib mesylate (Imatinib <wbr> Mesylate)

Compound 4 can be obtained in two ways, benzyl bromide 1 and secondary amines 2 by SN2 reaction, or the aldehyde 3 with a secondary amine 2 by reductive amination. Sodium cyanoborohydride electron withdrawing effect of the cyano group, thereby reducing the activity of the negative hydrogen, it may be present in acidic solution. Also in the acidic conditions of aldehydes and secondary amines imine positive ions, which is higher than the activity of aldehyde reduction.This is why the reductive amination reagent with inert negative and hydrogen under acidic conditions. 4 hydrolyzed ester with thionyl chloride into the acid chloride 5 . The reaction of aniline and cyanamide dinucleophile guanidine 7 . Compound 8 and DMF-DMA reaction electrophilic reagent parents 9 , 7 , and 9 ring closure under alkaline conditions to generate 10 . Finally, reduction, amidation, and a salt of imatinib mesylate generated.


Org. Process Res. Dev., 2012, 16 (11), pp 1794–1804
DOI: 10.1021/op300212u
Abstract Image

An efficient, economic process has been developed for the production of imatinib with 99.99% purity and 50% overall yield from four steps. Formation and control of all possible impurities is described. The synthesis comprises the condensation of N-(5-amino-2-methylphenyl)-4-(3-pyridinyl)-2-pyrimidineamine with 4-(4-methylpiperazinomethyl)benzoyl chloride in isopropyl alcohol solvent in the presence of potassium carbonate to yield imatinib base.


Org. Biomol. Chem., 2013,11, 1766-1800

DOI: 10.1039/C2OB27003J!divAbstract

Imatinib (1), nilotinib (2) and dasatinib (3) are Bcr-Abl tyrosine kinase inhibitors approved for the treatment of chronic myelogenous leukemia (CML). This review collates information from the journal and patent literature to provide a comprehensive reference source of the different synthetic methods used to prepare the aforementioned active pharmaceutical ingredients (API’s).

Graphical abstract: The synthesis of Bcr-Abl inhibiting anticancer pharmaceutical agents imatinib, nilotinib and dasatinib


Organic Process Research & Development, 12(3), 490-495. DOI: 10.1021/op700270nAs an example of research aimed at industrial production one involving imatinib. This cancer drug was one of the first offspring of rational drug design and if you believe the Wikipedia page hugely expensive despite its simple appearance (no stereocenters!). A group of Northwest University researchers set out to improve the existing Novartis procedure DOI and here is how they did it.

2-acetylpyridine (1) was alkylated with the acetal of N,N-dimethylformamide 2 to enamine 3. A pyrimidine ring in 5was formed with base and reagent guanidine nitrate 4 and nitrotoluene fragment 6 was added in a Ullmann-type reaction with CuI generating secondary amine 7. The nitro group was reduced by hydrazine / FeCl3/C to the amine which was then converted to amide 8 with acid chloride 9. The final step is addition of piperazine 10 to form imatinib11.So is this procedure an improvement on the existing method and ready-made for industrial implementation? Surely they have eradicated the use of toxic cyanamide, cumbersome sodium metal and expensive palladium but they have also introduced equally toxic hydrazine and the harmful and explosive guanidine nitrate. As a further point of criticism the final step is demonstrated on a 0.5 gram scale. If the journal Organic Process Research & Development would live up to its standards the scale would at least be a kilogram.Liu, Y., Wang, C., Bai, Y., Han, N., Jiao, J., Qi, X. (2008). A Facile Total Synthesis of Imatinib Base and Its Analogues. Organic Process Research & Development, 12(3), 490-495. DOI: 10.1021/op700270n

Tetrahedron Lett. 2007, 48, 3455. DOI: 10.1016/j.tetlet.2007.03.033

Angelo Carotti and his group from University of Bari have developed a solid-phase synthesis of Imatinib which acts as a selective tyrosine kinase inhibitor (Tetrahedron Lett. 2007, 48, 3455. DOI: 10.1016/j.tetlet.2007.03.033). By applying microwave heating in five steps of the synthesis (preparation of linker 1, nucleophilic substitution, reduction of the nitro group, formation of guanidine and final cyclization) the total process could be accelerated. Key steps were the guanylation of aniline 2 where a higher yield and purity of product 3 could be obtained under microwave irradiation, and the final cyclization to resin bound Imatinib where the reaction time could be reduced from 20 h to 50 min. Addiotionally, resin stability was ensured due to the shorter reaction time.



process for the preparation of imatinib, which comprises the reaction of 4-Methyl-N-(4-pyridin-3-yl-pyrimidin-2-yl)- benzene-l,3-diamine (II) also referred as N-(5-amino -2-methylphenyl)-4-(3-pyridyl)-2- pyrimidine amine with 4-(4-Methyl-piperazin-l-ylmethyl)-benzoic acid ester (III) in the presence of a base in a suitable solvent to yield substantially pure imatinib base in about 90% yield.

Figure imgf000012_0001

R is C1-C4 alkyl group The preparation of 4-Methyl-N-(4-pyridin-3-yl-pyrimidin-2-yl)-benzene-l,3-diamine (II) and 4-(4-Methyl-piperazin-l-ylmethyl)-benzoic acid ester (III) may be carried out according to prior art methods.

Compound of formula (II) can be synthesized by the process disclosed in WO2004/ 108669 comprising

Figure imgf000012_0002

reacting 2-methyl-5-nitroaniline with 50% aqueous solution of cyanamide to obtain N-(2- Methyl-5-nitrophenyl)-guanidinium nitrate, which further reacted with 3-dimethylamino- l-pyridin-3-yI-propenone to yield (2-methyI-5-nitrophenyl)-(4-pyridin-3-yI-pyrimidin -2- yl)-amine, finally, reduction of nitro group to obtain compound of formula (Π).

Componds of formula (III) can be synthesized by the process disclosed in synthtic communications 2003, 3597

Figure imgf000013_0001

comprising reacting a-halogen-/?-toluinitrile or methanesulfonic acid 4-cyano-benzyl ester or toluene-4-sulfonic acid 4-cyano-benzyl ester with N-methylpiperazine, followed by hydrolysis of the cyano to acid which formed as dihydrochloride contain half crystalline hydrate, finally reaction with alcohol to obtain compound of formula (III).

The synthetic route for preparing imatinib according to the present invention is is given below

Figure imgf000013_0002


Example 1

To a solution of 4-Methyl-N-(4-pyridin-3-yl-pyrimidin-2-yl)-benzene-l,3-diamine (27.7g) and 4-(4-Methyl-piperazin-l-ylmethyl)-benzoic acid methyl ester (50g) in Tetrahydrofuran (250ml), a solution of sodium methylate (lOg) in methanol (10ml) was added. The reaction mixture was heated to reflux. After completion of the reaction solution was poured into ice-water and a large amount of solid precipitated, which was filtered and washed with water and dried to obtain Imatinib base (45g). Yield: 91%.

The spectral data is as follows:

Ή NMR ( 500M , DMSO ) δ : 10.2 (s, lH), 9.30 (s, 1H), 8.99 (s, 1H), 8.72 (d, J=4.0

Hz, 1H), 8.57 (s, 1H), 8.53 (s, 1H), 8.11 (s, 1H), 8.00 (s, 1H), 7.98 (s, 1H), 7.58-7.51 (m, 4H), 7.44 (d, J=4.3 Hz, 1H), 7.22 (d, J=8.1 Hz, 1H), 3.70 (s, 2H), 3.50-3.25 (m, 2H),

3.20-2.90 (m, 4H), 2.81 (s, 3H), 2.40 (s, 3H), 2.24 (s, 3H). 13C NMR (125M ,

DMSO ) δ : 164.9, 161.3, 161.1, 159.4, 150.8, 147.7, 137.7, 137.1, 134.9, 134.3, 132.3, 129.9, 129.1, 127.7, 127.6, 123.9, 117.2, 1 16.8, 107.5, 59.9, 52.1, 48.9, 42.2, 17.5.

MS (M++l): 494.3

Example 2

To a solution of 4-Methyl-N-(4-pyridin-3-yl-pyrimidin-2-yl)-benzene-l,3-diamine (27.7g) and 4-(4-Methyl-piperazin-l-ylmethyl)-benzoic acid methyl ester (50g) in toluene (250ml), a solution of sodium ethoxide (20g) in methanol (10ml) was added. The reaction mixture was heated to reflux. After completion of the reaction, solution was poured into ice-water and a large amount of solid precipitated, which was filtered and washed with water and dried to obtain Imatinib base (44g). Yield: 91%.

Example 3

To a solution of potassium butoxide (250g) in methanol (1000ml), a solution of 4-Methyl- N-(4-pyridin-3-yl-pyrimidin-2-yl)-benzene-l,3-diamine (277g) and 4-(4-Methyl- piperazin-l-ylmethyl)-benzoic acid propyl ester (600g) in Tetrahydrofuran (2500ml) was added. The reaction mixture was stirred at room temperature. After completion of the reaction solution was poured into ice-water and a large amount of solid precipitated, which was filtered and washed with water and dried to obtain Imatinib base (450g). Yield: 91%. Example 4

To a solution of potassium butoxide (25kg) in ethanol (lOOLitre), a solution of 4-Methyl- N-(4-pyridin-3-yI-pyrimidin-2-yl)-benzene-l,3-diamine (27.7kg) and 4-(4-MethyI- piperazin-l-ylmethyl)-benzoic acid ethyl ester (50.0kg) in toluene (250Litre) was added. The reaction mixture was stirred at room temperature. After completion of reaction, solution was poured into ice-water and a large amount of solid precipitated, which was filtered and washed with water, and dried to obtain Imatinib base (40.0kg). Yield: 81%.




Synthesis of SKI696. (A) isopropanol/sodium hydroxide (a); iron/acetic acid/EtOH/water (b); triethyl amine/acetonitrile (c); 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride/N,N-dimethylaminopyridine/dimethylformamide (d); trifluoroacetic acid/dichloromethane (e); potassium carbonate/acetonitrile (f). (B) 18F-KF/Kryptofix/1,2-dichlorobenzene (g); dimethylformamide/acetonitrile (h).


In order to prepare the core heterocyclic unit a direct condensation between a 1,3-dicarbonyl compound 3.39 and an amidine or guanidine 3.40 is frequently employed (Scheme 36a). Alternatively, an amidine can be condensed with a vinylogous amide 3.41 resulting in the direct formation of 2,4-disubstituted pyrimidines. These condensations often require relatively harsh reaction conditions despite this they are of great value as they involve cheap or easily accessible materials and typically only form water as the principle byproduct.

A modification of the above pyrimidine synthesis has been applied in the generation of imatinib (3.36, Gleevec) which is Novartis’ tyrosine kinase inhibitor used for the treatment of chronic myeloic leukaemia. In a patented route the aldol product 3.47 undergoes a condensation reaction with guanidine 3.48 in basic media to give the 2-aminopyrimidine 3.49 (Scheme 37) [93]. After generating the functional pyrimidine core a hydrazine-mediated reduction of the nitro group in the side chain was conducted with Raney-Nickel as the catalyst. Amide formation with 4-chloromethylbenzoyl chloride (3.50) and a direct displacement of the benzylic chloride with N-methylpiperazine (1.118) complete this synthesis of imatinib in excellent overall yields.

Scheme 37: Synthesis of imatinib.

One noteworthy feature of this imatinib synthesis is that it is specifically designed for facile isolation of intermediates by precipitation due to their limited solubility in non-polar solvents [94]. Whilst this process was efficient in enabling the isolation of pure material after each step, it does not encourage telescoping of steps, which would in principal increase the overall efficiency of the process. Recently, similar approaches have been utilised in the academic environment using enabling techniques in a route to imatinib. For instance, our group has employed continuous flow synthesis methods to imatinib [95,96]. The route not only afforded imatinib but led to many previously inaccessible derivatives in an automated fashion within a single working day (Scheme 38). In addition, this particular sequence showcases the uses of scavenger resins for in-line purification as the synthesis progresses and features the use of a Buchwald–Hartwig amination in a late stage fragment coupling. While it was sufficient to access only small amounts of these structures (around 50 mg), these techniques are currently being adopted by several major pharmaceutical companies in order to enhance drug development and even manufacturing sequences.

Scheme 38: Flow synthesis of imatinib.
pick up ref from


Imatinib is a tyrosine-kinase inhibitor used for the treatment of cancer.  A key steps in its synthesis is the enamine formation highlighted in green below.

1) Show a mechanism for this transformation?

2) This particular enamine is rather stable.  Comment on it relatively high stability?  (i.e. What make it so stable?)

Imatinib Synthesis


Org. Biomol. Chem., 2009,7, 5129-5136

DOI: 10.1039/B913333J!divAbstract

Protein kinases catalyze the phosphorylation of serine, threonine, tyrosine and histidine residues in proteins. Aberrant regulation of kinase activity has been implicated in many diseases including cancer. Thus development of new strategies for kinase inhibitor design remains an active area of research with direct relevance to drug development. Abelson (Abl)tyrosine kinase is one of the Src-family of tyrosine kinases and is directly implicated in Chronic Myelogenous Leukemia (CML). In this article, we have, for the first time, developed an efficient method for the construction of small molecule-based bisubstrate inhibitors of Abl kinase using click chemistry. Subsequent biochemical screenings revealed a set of moderately potentinhibitors, a few of which have comparable potency to Imatinib (an FDA-approved drug for treatment of chronic myeloid leukemia) against Abl.

Graphical abstract: Rapid synthesis of Abelson tyrosine kinase inhibitors using click chemistry


Medicine for Blood Cancer

‘Imitinef Mercilet’ is a medicine which cures blood cancer.
Its available free of cost at “Adyar Cancer Institute in Chennai”.
Create Awareness. It might help someone.Cancer Institute in Adyar, Chennai

‘Imitinef Mercilet’ is apparently an alternative spelling of the drug Imatinib mesylate which is used in the treatment of some forms of leukemia along with other types of cancer. Imatinib, often referred to a “Gleevec”, has proved to be an effective treatment for some forms of cancers. However, “blood cancer” is a generalized term for cancers that affect the blood, lymphatic system or bone marrow. The three types of blood cancer are listed as leukemia, lymphoma, and multiple myeloma. These three malignancies require quite different kinds of treatments. While drugs (including Imatinib), along with other treatments such as radiation can help to slow or even stop the progress of these cancers, there is currently no single drug treatment that can be said to actually cure all such cancers.

Category: Cancer
Address: East Canal Bank Road , Gandhi Nagar
Adyar, Chennai -600020
Landmark: Near Michael School
Phone: 044-24910754 044-24910754 ,
044-24911526 044-24911526 , 044-22350241

Imatinib is a small molecule selectively inhibiting specific tyrosine kinases that has emerged recently as a valuable treatment for patients with advanced GIST. The use of imatinib as monotherapy for the treatment of GIST has been described in PCT publication WO 02/34727, which is here incorporated by reference. However, it has been reported that primary resistance to imatinib is present in a population of patients, for example 13.7% of patients in one study. In addition, a number of patients acquire resistance to treatment with imatinib. More generally this resistance is partial with progression in some lesions, but continuing disease control in other lesions. Hence, these patients remain on imatinib treatment but with a clear need for additional or alternative therapy.

Imatinib is 4-(4-methylpiperazin-1-ylmethyl)-N-[4-methyl-3-(4-pyridin-3-yl)pyrimidin-2-ylamino)phenyl]-benzamide having the formula I

The preparation of imatinib and the use thereof, especially as an anti-tumour agent, are described in Example 21 of European patent application EP-A-0 564 409, which was published on 6 Oct. 1993, and in equivalent applications and patents in numerous other countries, e.g. in U.S. Pat. No. 5,521,184 and in Japanese patent 2706682

flow synthesis

The flow-based route required minimal manual intervention and was achieved despite poor solubility of many reaction components

21 January 2013Michael Parkin

UK chemists have used a combination of flow chemistry methods with solid-supported scavengers and reagents to synthesise the active pharmaceutical ingredient, imatinib, of the anticancer drug Gleevec. The method avoids the need for any manual handling of intermediates and allows the drug to be synthesised in high purity in less than a day.

Gleevec, developed by Novartis, is a tyrosine kinase inhibitor used for the treatment of chronic myeloid leukaemia and gastrointestinal stromal tumours.




‘Wrapping’ Gleevec Fights Drug-Resistant Cancer, Study Shows

The anti-cancer drug Gleevec® is far more effective against a drug-resistant strain of cancer when the drug wraps the target with a molecular bandage that seals out water from a critical area. This image shows the bandage (black box) on the modified version of the drug, WBZ-7. (Credit: Image courtesy of Rice University)

A new study in Cancer Research finds that the anti-cancer drug Gleevec® is far more effective against a drug-resistant strain of cancer when the drug wraps the target with a molecular bandage that seals out water from a critical area.

FIG 23.8 Optimization of imatinib as a chemotherapeutic agent. The discovery that 2-phenylaminopyrimidine inhibitors of PKC also inhibit the unrelated v-Abl oncogene turned attention to its potential use in the treatment of chronic myelogenous leukaemia. Starting with the 2-phenylaminopyrimidine backbone, addition of the benzamidine group increased activity against tyrosine kinases, the methyl group reduced its activity against PKC (so-called ‘ target hopping ’ ). Addition of a 3’-pyridyl group improved the activity in cellular assays. Subsequent addition of N -methylpiperazine increased water solubility and oral bioavailability, enabling the drug to survive the stomach and to enter the bloodstream.


An automated flow-based synthesis of imatinib: the API of gleevec M.D. Hopkin, I.R. Baxendale, S.V. Ley, J.C.S. Chem. Commun.2010, 46, 2450-2452.


  1. Jump up^ Novartis Pharma AG. Gleevec® (imatinib mesylate) tablets prescribing information. East Hanover, NJ; 2006 Sep. Anon. Drugs of choice for cancer. Treat Guidel Med Lett. 2003; 1:41–52
  2. Jump up^ Goldman JM, Melo JV (October 2003). “Chronic myeloid leukemia–advances in biology and new approaches to treatment”. N. Engl. J. Med. 349 (15): 1451–64.doi:10.1056/NEJMra020777. PMID 14534339.
  3. Jump up^ Fausel, C. Targeted chronic myeloid leukemia therapy: Seeking a cure. Am J Health Syst Pharm 64, S9-15 (2007)
  4. Jump up^ Stegmeier F, Warmuth M, Sellers WR, Dorsch M (May 2010). “Targeted cancer therapies in the twenty-first century: lessons from imatinib”. Clin. Pharmacol. Ther. 87(5): 543–52. doi:10.1038/clpt.2009.297. PMID 20237469.
  5. Jump up^ “Novartis fails to patent Glivec (Gleevec) in India”.
  6. Jump up^ Rowley to receive Japan Prize for her role in the development of targeted cancer therapy Eurekalert, Press release, 24 January 2012
  7. Jump up^ Leukemia Drug and Magnet Material Net Japan Prizes by Dennis Normile, Science Insider, 25 January 2012
  8. ^ Jump up to:a b c “FDA Highlights and Prescribing Information for Gleevec(imatinib mesylate)”.
  9. Jump up^ “Prolonged Use of Imatinib in GIST Patients Leads to New FDA Approval”.
  10. Jump up^ “FDA approves Gleevec for children with acute lymphoblastic leukemia”. FDA News Release. US Food and Drug Administration. 25 January 2013. Retrieved 3 April 2013.
  11. Jump up^ Yang FC, Ingram DA, Chen S, Zhu Y, Yuan J, Li X, Yang X, Knowles S, Horn W, Li Y, Zhang S, Yang Y, Vakili ST, Yu M, Burns D, Robertson K, Hutchins G, Parada LF, Clapp DW (October 2008). “Nf1-dependent tumors require a microenvironment containing Nf1+/–and c-kit-dependent bone marrow”. Cell 135 (3): 437–48.doi:10.1016/j.cell.2008.08.041. PMC 2788814. PMID 18984156. Lay summaryScience Daily.
  12. Jump up^ “Gleevec NF1 Trial”. Retrieved 2013-04-03.
  13. Jump up^ “GIST in Neurofibromatosis 1”. 2010-05-14. Retrieved 2013-04-03.
  14. Jump up^ “”Pilot Study of Gleevec/Imatinib Mesylate (STI-571, NSC 716051) in Neurofibromatosis (NF1) Patient With Plexiform Neurofibromas (0908-09)” (Suspended)”. Retrieved 2013-04-03.
  15. Jump up^ Droogendijk HJ, Kluin-Nelemans HJ, van Doormaal JJ, Oranje AP, van de Loosdrecht AA, van Daele PL (July 2006). “Imatinib mesylate in the treatment of systemic mastocytosis: a phase II trial”. Cancer 107 (2): 345–51. doi:10.1002/cncr.21996.PMID 16779792.
  16. Jump up^ Tapper EB, Knowles D, Heffron T, Lawrence EC, Csete M (June 2009). “Portopulmonary hypertension: imatinib as a novel treatment and the Emory experience with this condition”. Transplant. Proc. 41 (5): 1969–71.doi:10.1016/j.transproceed.2009.02.100. PMID 19545770.
  17. Jump up^ Boucher P, Gotthardt M, Li WP, Anderson RG, Herz J (April 2003). “LRP: role in vascular wall integrity and protection from atherosclerosis”. Science 300 (5617): 329–32.doi:10.1126/science.1082095. PMID 12690199.
  18. Jump up^ Lassila M, Allen TJ, Cao Z, Thallas V, Jandeleit-Dahm KA, Candido R, Cooper ME (May 2004). “Imatinib attenuates diabetes-associated atherosclerosis”. Arterioscler. Thromb. Vasc. Biol. 24 (5): 935–42. doi:10.1161/01.ATV.0000124105.39900.db.PMID 14988091.
  19. Jump up^ Reeves PM, Bommarius B, Lebeis S, McNulty S, Christensen J, Swimm A, Chahroudi A, Chavan R, Feinberg MB, Veach D, Bornmann W, Sherman M, Kalman D (July 2005). “Disabling poxvirus pathogenesis by inhibition of Abl-family tyrosine kinases”. Nat. Med.11 (7): 731–9. doi:10.1038/nm1265. PMID 15980865.
  20. Jump up^ He G, Luo W, Li P, Remmers C, Netzer WJ, Hendrick J, Bettayeb K, Flajolet M, Gorelick F, Wennogle LP, Greengard P (September 2010). “Gamma-secretase activating protein is a therapeutic target for Alzheimer’s disease”. Nature 467 (7311): 95–8.doi:10.1038/nature09325. PMC 2936959. PMID 20811458.
  21. Jump up^ “Alzheimer’s may start in liver – Health – Alzheimer’s Disease | NBC News”. MSNBC. Retrieved 2013-01-06.
  22. Jump up^ Holmes C, Boche D, Wilkinson D, Yadegarfar G, Hopkins V, Bayer A, Jones RW, Bullock R, Love S, Neal JW, Zotova E, Nicoll JA (July 2008). “Long-term effects of Abeta42 immunisation in Alzheimer’s disease: follow-up of a randomised, placebo-controlled phase I trial”. Lancet 372 (9634): 216–23. doi:10.1016/S0140-6736(08)61075-2. PMID 18640458.
  23. Jump up^ Eliminating Morphine Tolerance – Reformulated Imatinib 23 Feb 2012, 5:00 PST
  24. Jump up^ “GLIVEC Tablets – Summary of Product Characteristics (SPC)”. electronic Medicines Compendium. Novartis Pharmaceuticals UK Ltd.
  25. ^ Jump up to:a b c “Gleevec (imatinib) dosing, indications, interactions, adverse effects, and more”.Medscape Reference. WebMD. Retrieved 24 January 2014.
  26. Jump up^ “Imatinib”. Macmillan Cancer Support. Retrieved 26 December 2012.
  27. ^ Jump up to:a b Haberfeld, H, ed. (2009). Austria-Codex (in German) (2009/2010 ed.). Vienna: Österreichischer Apothekerverlag. ISBN 3-85200-196-X.
  28. Jump up^ Kerkelä R, Grazette L, Yacobi R, Iliescu C, Patten R, Beahm C, Walters B, Shevtsov S, Pesant S, Clubb FJ, Rosenzweig A, Salomon RN, Van Etten RA, Alroy J, Durand JB, Force T (August 2006). “Cardiotoxicity of the cancer therapeutic agent imatinib mesylate”. Nat. Med. 12 (8): 908–16. doi:10.1038/nm1446. PMID 16862153.
  29. Jump up^ Shima H, Tokuyama M, Tanizawa A, Tono C, Hamamoto K, Muramatsu H, Watanabe A, Hotta N, Ito M, Kurosawa H, Kato K, Tsurusawa M, Horibe K, Shimada H (October 2011). “Distinct impact of imatinib on growth at prepubertal and pubertal ages of children with chronic myeloid leukemia”. J. Pediatr. 159 (4): 676–81.doi:10.1016/j.jpeds.2011.03.046. PMID 21592517.
  30. ^ Jump up to:a b c d “GLIVEC (imatinib)” (PDF). TGA eBusiness Services. Novartis Pharmaceuticals Australia Pty Ltd. 21 August 2013. Retrieved 24 January 2014.
  31. Jump up^ PDB 1IEP; Nagar B, Bornmann WG, Pellicena P, Schindler T, Veach DR, Miller WT, Clarkson B, Kuriyan J (August 2002). “Crystal structures of the kinase domain of c-Abl in complex with the small molecule inhibitors PD173955 and imatinib (STI-571)”. Cancer Res. 62 (15): 4236–43. PMID 12154025.
  32. Jump up^ Takimoto CH, Calvo E. “Principles of Oncologic Pharmacotherapy” in Pazdur R, Wagman LD, Camphausen KA, Hoskins WJ (Eds)Cancer Management: A Multidisciplinary Approach. 11 ed. 2008.
  33. Jump up^ Gambacorti-Passerini CB, Gunby RH, Piazza R, Galietta A, Rostagno R, Scapozza L (February 2003). “Molecular mechanisms of resistance to imatinib in Philadelphia-chromosome-positive leukaemias”. Lancet Oncol. 4 (2): 75–85. doi:10.1016/S1470-2045(03)00979-3. PMID 12573349.
  34. Jump up^ Deininger MW, Druker BJ (September 2003). “Specific targeted therapy of chronic myelogenous leukemia with imatinib”. Pharmacol. Rev. 55 (3): 401–23.doi:10.1124/pr.55.3.4. PMID 12869662.
  35. Jump up^ Vigneri P, Wang JY (February 2001). “Induction of apoptosis in chronic myelogenous leukemia cells through nuclear entrapment of BCR-ABL tyrosine kinase”. Nat. Med. 7 (2): 228–34. doi:10.1038/84683. PMID 11175855.
  36. Jump up^ Weisberg E, Manley PW, Cowan-Jacob SW, Hochhaus A, Griffin JD (May 2007). “Second generation inhibitors of BCR-ABL for the treatment of imatinib-resistant chronic myeloid leukaemia”. Nature Reviews Cancer 7 (5): 345–56. doi:10.1038/nrc2126.PMID 17457302.
  37. Jump up^ Scheinfeld N, Schienfeld N (February 2006). “A comprehensive review of imatinib mesylate (Gleevec) for dermatological diseases”. J Drugs Dermatol 5 (2): 117–22.PMID 16485879.
  38. Jump up^ Klopp, T, ed. (2010). Arzneimittel-Interaktionen (in German) (2010/2011 ed.). Arbeitsgemeinschaft für Pharmazeutische Information. ISBN 978-3-85200-207-1.
  39. ^ Jump up to:a b Staff, (a project of the Pharmaceutical Research and Manufacturers of America)The Story of Gleevec
  40. Jump up^ Claudia Dreifus for the New York Times. November 2, 2009 Researcher Behind the Drug Gleevec
  41. ^ Jump up to:a b A Conversation With Brian J. Druker, M.D., Researcher Behind the Drug Gleevecby Claudia Dreifus, The New York Times, 2 November 2009
  42. Jump up^ Gambacorti-Passerini C (2008). “Part I: Milestones in personalised medicine—imatinib”. Lancet Oncology 9 (600): 600. doi:10.1016/S1470-2045(08)70152-9.PMID 18510992.
  43. Jump up^ Druker BJ, Lydon NB (January 2000). “Lessons learned from the development of an abl tyrosine kinase inhibitor for chronic myelogenous leukemia”. J. Clin. Invest. 105 (1): 3–7. doi:10.1172/JCI9083. PMC 382593. PMID 10619854.
  44. ^ Jump up to:a b c U.S. Patent 5,521,184
  45. Jump up^ “Imatinib Patent Family”. Espacenet. 1996. Retrieved 2014-07-23.
  46. ^ Jump up to:a b EP 0564409
  47. Jump up^ Staff, European Medicines Agency, 2004.EMEA Scientific Discussion of Glivec
  48. Jump up^ Note: The Indian patent application, which became the subject of litigation in India that gathered a lot of press, does not appear to be publicly available. However according todocuments produced in the course of that litigation (page 27), “The Appellant’s application under the PCT was substantially on the same invention as had been made in India.”
  49. ^ Jump up to:a b WO 9903854
  50. Jump up^ U.S. Patent 6,894,051
  51. Jump up^ FDA Orange Book; Patent and Exclusivity Search Results from query on Appl No 021588 Product 001 in the OB_Rx list.
  52. Jump up^ Novartis press release, May 10, 2001. [ FDA approves Novartis’ unique cancer medication Glivec®
  53. Jump up^ Cohen MH et al. Approval Summary for Imatinib Mesylate Capsules in the Treatment of Chronic Myelogenous Leukemia Clin Cancer Res May 2002 8; 935
  54. Jump up^ Margot J. Fromer for Oncology Times. December 2002. What’s in a Name? Quite a Lot When It Comes to Marketing & Selling New Cancer Drugs
  55. Jump up^ Novartis Press Release. April 30 2001Novartis Oncology Changes Trade Name of Investigational Agent Glivec(TM) to Gleevec(TM) in the United States
  56. Jump up^ Experts in Chronic Myeloid Leukemia. The price of drugs for chronic myeloid leukemia (CML) is a reflection of the unsustainable prices of cancer drugs: from the perspective of a large group of CML experts Blood. 2013 May 30;121(22):4439-42. PMID 23620577
  57. Jump up^ Andrew Pollack for the New York Times, April 25, 2013 Doctors Denounce Cancer Drug Prices of $100,000 a Year
  58. Jump up^ Schiffer CA (July 2007). “BCR-ABL tyrosine kinase inhibitors for chronic myelogenous leukemia”. N. Engl. J. Med. 357 (3): 258–65. doi:10.1056/NEJMct071828.PMID 17634461.
  59. Jump up^ As Pills Treat Cancer, Insurance Lags Behind, By ANDREW POLLACK, New York Times, 14 April 2009
  60. Jump up^ Living With a Formerly fatal Blood Cancer, By JANE E. BRODY, New York Times, 18 January 2010
  61. Jump up^ Patented Medicine Review Board (Canada). Report on New Patented Drugs – Gleevec.
  62. Jump up^ “”. Retrieved 2013-04-03.
  63. Jump up^ Gardiner Harris and Katie Thomas for the New York Times. April 1 2013 Top court in India rejects Novartis drug patent
  64. Jump up^ Note: The Indian patent application No.1602/MAS/1998 does not appear to be publicly available. However according to the decision of the IPAB on 26 June 2009 (page 27) discussed below, “The Appellant’s application under the PCT was substantially on the same invention as had been made in India.”
  65. Jump up^ Staff, European Medicines Agency, 2004. EMEA Scientific Discussion of Glivec
  66. Jump up^ Indian Supreme Court Decision paragraphs 5-6
  67. Jump up^ Novartis v UoI, para 8-9
  68. ^ Jump up to:a b Shamnad Basheer for Spicy IP March 11, 2006First Mailbox Opposition (Gleevec) Decided in India
  69. Jump up^ Staff, LawyersCollective. September 6, 2011[ Novartis case: background and update – Supreme Court of India to recommence hearing
  70. Jump up^ R. Jai Krishna and Jeanne Whalen for the Wall Street Journal. April 1, 2013Novartis Loses Glivec Patent Battle in India
  71. Jump up^ Intellectual Property Appellate Board decision dated 26 June 2009, p 149
  72. Jump up^ W.P. No.24759 of 2006
  73. Jump up^ “Supreme Court rejects bid by Novartis to patent Glivec”.
  74. Jump up^ Novartis v UoI, Para 191
  75. Jump up^ Novartis v UoI, Para 24-25
  76. Jump up^ “How the Indian judgment will reverberate across the world”.
  77. Jump up^ “Patented drugs must be priced smartly”.
  78. Jump up^ Patent with a purpose, Prof. Shamnad Basheer, Indian Express, 3 April 2013
  79.  Kevin Grogan for PharmaTimes. February 27, 2012 Novartis explains stance over India patent law challenge
  80.  Berne Declaration. May 8, 2007 Short questions and answers about the court case initiated by Novartis in India

External links


Title: Imatinib
CAS Registry Number: 152459-95-5
CAS Name: 4-[(4-Methyl-1-piperazinyl)methyl]-N-[4-methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl]amino]phenyl]benzamide
Additional Names: N-[5-[4-(4-methylpiperazinomethyl)benzoylamido]-2-methylphenyl]-4-(3-pyridyl)-2-pyrimidineamine
Molecular Formula: C29H31N7O
Molecular Weight: 493.60
Percent Composition: C 70.57%, H 6.33%, N 19.86%, O 3.24%
Literature References: Tyrosine kinase inhibitor; highly specific for BCR-ABL, the enzyme associated with chronic myelogenous leukemia (CML) and certain forms of acute lymphoblastic leukemia (ALL). Also shown to inhibit the transmembrane receptor KIT and platelet-derived growth factor (PDGF) receptors. Prepn: J. Zimmermann, EP 564409; idem, US 5521184 (1993, 1996 both to Ciba-Geigy); idem et al., Bioorg. Med. Chem. Lett. 7, 187 (1997). Structural mechanism of ABL specificity: T. Schindler et al., Science 289, 1938 (2000). Activity vs KIT and PDGF receptor kinases: E. Buchdunger et al., J. Pharmacol. Exp. Ther. 295, 139 (2000). Clinical trial in CML: H. Kantarjian et al., N. Engl. J. Med. 346, 645 (2002); in gastrointestinal stromal tumors related to KIT: G. D. Demetri et al., ibid. 347, 472 (2002). Review of clinical experience: D. G. Savage, K. H. Antman, ibid. 346, 683-693 (2002); and pharmacology: V. K. Pindolia et al., Pharmacotherapy 22, 1249-1265 (2002); and development of therapeutic target: B. J. Druker, Adv. Cancer Res. 91, 1-30 (2004).
Properties: mp 211-213°. pKa1 8.07; pKa2 3.73; pKa3 2.56; pKa4 1.52.
Melting point: mp 211-213°
pKa: pKa1 8.07; pKa2 3.73; pKa3 2.56; pKa4 1.52
Derivative Type: Methanesulfonate
CAS Registry Number: 220127-57-1
Manufacturers’ Codes: STI-571; CGP-57148B
Trademarks: Gleevec (Novartis); Glivec (Novartis)
Molecular Formula: C29H31N7O.CH3SO3H
Molecular Weight: 589.71
Percent Composition: C 61.10%, H 5.98%, N 16.63%, O 10.85%, S 5.44%
Literature References: Prepn of crystalline form: J. Zimmermann et al., WO 9903854 (1999 to Novartis).
Properties: Occurs in 2 crystalline modifications. a-form, begins to melt at 226°; b-form, mp 217°. Lipophilic at pH 7.4. Soly in water: >100 g/l (pH 4.2); 49 mg/l (pH 7.4).
Melting point: mp 217°
Therap-Cat: Antineoplastic.
Keywords: Antineoplastic, Tyrosine Kinase Inhibitors,  imatinib mesylate, GGP-57148B, STI-571, CGP-57148 (free base), Gleevec, Glivec, imatinib
Mp 206 – 207 °C (lit.:1   207 – 210 °C);
1=  1 Y.‐F. Liu, C.‐L. Wang, Y.‐J. Bai, N. Han, J.‐P. Jiao and X.‐L. Qi, Org. Process Res. Dev., 2008, 12, 490.
IR νmax/cm-1 3275.0(w), 2928.5(w),
2796.5(w), 1645.9(m), 1586.0(m), 1575.1(s), 1554.0(m), 1531.5(s), 1510.3(m), 1478.1(m),
1448.9(s), 1416.7(m), 1377.7(m), 1352.2(m), 1334.8(m), 1325.6(m), 1308.8(m), 1290.3(s),
1261.1(m), 1204.3(m), 1164.1(m), 1141.7(m), 1124.6(w), 1102.6(m), 1089.2(w), 1052.0(w),
1024.4(w), 1010.0(m), 992.5(w), 968.3(w), 924.5(w), 886.2(w), 857.9(w), 850.3(w),
807.8(m), 795.7(s), 748.1(m), 703.2(m), 690.1(m), 670.7(m);
δH (d6-DMSO, 600 MHz) =
10.14 (1 H, s, NH), 9.26 (1 H, d, J = 1.5 Hz, 2H-pyridin-3-yl), 8.95 (1 H, s, NH), 8.66 (1 H, dd,
J = 4.8 and 1.2 Hz, 6H-pyridin-3-yl), 8.49 (1 H, d, J = 5.1 Hz, 6H-pyridin-2-amine), 8.46 (1 H,
ddd, J = 7.9, 1.5 and 1.2 Hz, 4H-pyridin-3-yl), 8.06 (1 H, d, J = 1.5 Hz, 3H-2-aminotoluene),
7.89 (2 H, d, J = 8.1 Hz, 2H-benzamide), 7.50 (1 H, dd, J = 7.9 and 4.8 Hz, 5H-pyridin-3-yl),
7.46 (1 H, dd, J = 8.3 and 1.5 Hz, 5H-2-aminotoluene), 7.42 – 7.40 (3 H, m, 3H-benzamide
and 5H-pyridin-2-amine), 7.18 (1 H, d, J = 8.3 Hz, 6H-2-aminotoluene), 3.51 (2 H, s, CH2),
2.50 – 2.20 (8 H, m, piperazine CH2), 2.20 (3 H, s, CCH3), 2.13 (3 H, s, NCH3);
δC (CDCl3,
150 MHz) = 165.42(C), 162.72(C), 160.57(C), 158.99(CH), 151.44(CH), 148.48(CH),
142.52(C), 137.77(C), 136.60(C), 134.92(CH), 133.88(C), 132.66(C), 130.75(CH),
129.28(CH), 127.00(CH), 124.23(C), 123.71(CH), 115.35(CH), 113.19(CH), 108.32(CH),
62.49(CH2), 55.07(CH2), 53.10(CH2), 45.98(CH3), 17.65(CH3);
Rf (MeOH) = 0.09; Rt 3.48,
M+H m/z = 494.2; HRMS calculated for C29H31N7ONa [M + Na]+, 516.2488; found 516.2491.
Inline image 1
Inline image 3
13 C NMR
Inline image 4
WO2006024863A1 * 2 Sep 2005 9 Mar 2006 Cipla Ltd Stable crystal form of imatinib mesylate and process for the preparation thereof
WO2006048890A1 * 20 Oct 2005 11 May 2006 Raja Jyotir Jani Imatinib mesylate crystal form and process for preparation thereof
WO2006054314A1 * 11 Aug 2005 26 May 2006 Natco Pharma Ltd Polymorphic forms of imatinib mesylate
WO2007023182A1 * 24 Aug 2006 1 Mar 2007 Novartis Ag Delta and epsilon crystal forms of imatinib mesylate
WO2007059963A1 * 23 Nov 2006 31 May 2007 Novartis Ag F,g,h,i and k crystal forms of imatinib mesylate
WO2007136510A2 * 27 Apr 2007 29 Nov 2007 Ivax Pharmaceuticals Sro Polymorphic forms of imatinib mesylate and processes for their preparation as well as of amorphous imatinib mesylate and form alpha
WO2008150481A2 * 29 May 2008 11 Dec 2008 Sicor Inc Processes for the preparation of crystalline form beta of imatinib mesylate
WO2010133976A2 24 May 2010 25 Nov 2010 Actavis Group Ptc Ehf Substantially pure imatinib or a pharmaceutically acceptable salt thereof
WO2011023146A1 19 Aug 2010 3 Mar 2011 Zentiva, K.S. Imatinib mesylate polymorphs generated by crystallization in aqueous inorganic salt solutions
WO2011049474A1 21 Oct 2010 28 Apr 2011 Tomasz Kozluk Salts of imatinib with tartaric acids
WO2011095835A1 22 Dec 2010 11 Aug 2011 Actavis Group Ptc Ehf Highly pure imatinib or a pharmaceutically acceptable salt thereof
WO2011099039A1 15 Feb 2011 18 Aug 2011 Reliance Life Sciences Pvt. Ltd. Process for the preparation of alpha form of imatinib mesylate
WO2011114337A1 15 Mar 2010 22 Sep 2011 Natco Pharma Limited Process for the preparation of highly pure crystalline imatinib base
WO2011157450A1 17 Jun 2011 22 Dec 2011 Krka, D. D., Novo Mesto New polymorphic form of imatinib base and preparation of salts thereof
WO2011158255A1 * 14 Jun 2011 22 Dec 2011 Aptuit Laurus Private Limited Process for preparation of stable imatintb mesylate alpha form
WO2013136141A1 * 22 Aug 2012 19 Sep 2013 Fresenius Kabi Oncology Ltd. An improved process for the preparation of alpha form of imatinib mesylate
CN102321070A * 27 Jul 2011 18 Jan 2012 江苏先声药物研究有限公司 Method for preparing imatinib methylolsulfonate alpha crystal through inverse solvent recrystallization method
CN102321070B 27 Jul 2011 22 May 2013 江苏先声药物研究有限公司 Method for preparing imatinib methylolsulfonate alpha crystal through inverse solvent recrystallization method
CN102633775B 6 Apr 2012 17 Jul 2013 江南大学 Method for preparing alpha-crystal-form imatinib mesylate
DE102007021043B4 * 4 May 2007 8 Apr 2010 Chemagis Ltd. Alpha-Form von Imatinib Mesylat und Verfahren zu seiner Herstellung
EP1988089A1 26 Oct 2007 5 Nov 2008 Sicor, Inc. Imatinib base, and imatinib mesylate and processes for preparation thereof
EP2009008A1 26 Oct 2007 31 Dec 2008 Sicor, Inc. Imatinib base, and imatinib mesylate and processes for preparation thereof
EP2311821A1 27 Apr 2007 20 Apr 2011 Sicor, Inc. Polymorphic form of Imatinib mesylate and processes for its preparation
EP2497464A2 20 Feb 2012 12 Sep 2012 Adamed SP. Z O.O. Pharmaceutical composition of imatinibe methanesulphonate and a process for its manufacture
EP2546248A1 * 23 Nov 2006 16 Jan 2013 Novartis AG Crystal form H of imatinib mesylate
EP2578580A1 * 23 Nov 2006 10 Apr 2013 Novartis AG G, I and K crystal forms of imatinib mesylate
EP2749557A1 * 31 Dec 2012 2 Jul 2014 Deva Holding Anonim Sirketi Process for preparation of alpha polymorph of imatinib mesylate from IPA and THF solvate forms of imatinib mesylate
EP2829538A1 * 27 Apr 2007 28 Jan 2015 Sicor, Inc. Polymorphic form of imatinib mesylate and process for its preparation
US7550591 2 May 2007 23 Jun 2009 Chemagis Ltd. 4-(4-methyl-piperazin-1-ylmethyl-benzoic acid with N-(5- amino-2-methylphenyl)-4-(3pyridyl)-2-pyrimidine-amine in the presence of a coupling reagent such as 2-(5-norborene-2,3- dicarboximido)- 1,1,3,3-tetramethyluronium tetrafluoroborate to produce imatinib, salt formation wtih methanesululfonic acid
US7879860 24 Aug 2006 1 Feb 2011 Novartis Ag Variations in melting points, hygroscopicities, solubilities, flow properties and/or thermodynamic stabilities
US7893076 23 Nov 2006 22 Feb 2011 Novartis Ag Crystalline form F of the methanesulfonic acid addition salt of Imatinib, 4-(4-methylpiperazin-1-ylmethyl)-N-[4-methyl-3-(4-(pyridin-3-yl)pyrimidin-2-ylamino)phenyl]-benzamide; suitable for topical, enteral, for example oral or rectal, or parenteral administration
US7947699 9 Jan 2009 24 May 2011 Actavis Group Ptc Ehf Anhydrous amorphous imatinib mesylate
US7977348 17 Apr 2008 12 Jul 2011 Sicor Inc. Polymorphic forms of imatinib mesylate and processes for preparation of novel crystalline forms as well as amorphous and form α
US8067421 27 Apr 2007 29 Nov 2011 Sicor Inc. Imatinib mesylate solvates with solvents selected from aliphatic alcohols, ethers, dioxolane, nitromethane, and acetic acid, and crystalline imatinib mesylate characterized by data selected from powder XRD patterns and solid state 13C NMR spectra; solubility in gastric juices
US8198289 14 Jan 2011 12 Jun 2012 Novartis Ag Crystal form H imatinib mesylate for pharmaceutical use
US8269003 2 Sep 2005 18 Sep 2012 Cipla Limited Stable crystal form of imatinib mesylate and process for the preparation thereof
US8414918 25 Sep 2008 9 Apr 2013 Teva Pharmaceutical Industries Ltd. Stable imatinib compositions
US8507515 15 Jul 2011 13 Aug 2013 Novartis Ag Crystalline form G of imatinib mesylate
US8592440 15 Jul 2011 26 Nov 2013 Novartis Ag Crystalline form I of imatinib mesylate
US8633213 15 May 2012 21 Jan 2014 Novartis Ag Crystalline form F of imatinib mesylate
US8846706 15 Jul 2011 30 Sep 2014 Novartis Ag Crystalline form K of imatinib mesylate
USRE43932 21 Sep 2011 15 Jan 2013 Novartis Ag Crystal modification of a N-phenyl-2-pyrimidineamine derivative, processes for its manufacture and its use




1 Comment

  1. I do not even understand how I stopped up right here, but I thought this
    post was once great. I don’t understand who you are but certainly you are going to a famous blogger for those who are not already.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.


Follow New Drug Approvals on

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 2,725 other followers



DR ANTHONY MELVIN CRASTO, Born in Mumbai in 1964 and graduated from Mumbai University, Completed his Ph.D from ICT, 1991,Matunga, Mumbai, India, in Organic Chemistry, The thesis topic was Synthesis of Novel Pyrethroid Analogues, Currently he is working with GLENMARK LIFE SCIENCES LTD, Research Centre as Principal Scientist, Process Research (bulk actives) at Mahape, Navi Mumbai, India. Total Industry exp 30 plus yrs, Prior to joining Glenmark, he has worked with major multinationals like Hoechst Marion Roussel, now Sanofi, Searle India Ltd, now RPG lifesciences, etc. He has worked with notable scientists like Dr K Nagarajan, Dr Ralph Stapel, Prof S Seshadri, Dr T.V. Radhakrishnan and Dr B. K. Kulkarni, etc, He did custom synthesis for major multinationals in his career like BASF, Novartis, Sanofi, etc., He has worked in Discovery, Natural products, Bulk drugs, Generics, Intermediates, Fine chemicals, Neutraceuticals, GMP, Scaleups, etc, he is now helping millions, has 9 million plus hits on Google on all Organic chemistry websites. His friends call him Open superstar worlddrugtracker. His New Drug Approvals, Green Chemistry International, All about drugs, Eurekamoments, Organic spectroscopy international, etc in organic chemistry are some most read blogs He has hands on experience in initiation and developing novel routes for drug molecules and implementation them on commercial scale over a 30 PLUS year tenure till date June 2021, Around 35 plus products in his career. He has good knowledge of IPM, GMP, Regulatory aspects, he has several International patents published worldwide . He has good proficiency in Technology transfer, Spectroscopy, Stereochemistry, Synthesis, Polymorphism etc., He suffered a paralytic stroke/ Acute Transverse mylitis in Dec 2007 and is 90 %Paralysed, He is bound to a wheelchair, this seems to have injected feul in him to help chemists all around the world, he is more active than before and is pushing boundaries, He has 9 million plus hits on Google, 2.5 lakh plus connections on all networking sites, 90 Lakh plus views on dozen plus blogs, 233 countries, 7 continents, He makes himself available to all, contact him on +91 9323115463, email, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 33 lakh plus views on New Drug Approvals Blog in 233 countries...... , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc

Personal Links

View Full Profile →



Follow my blog with Bloglovin The title of your home page You could put your verification ID in a comment Or, in its own meta tag Or, as one of your keywords Your content is here. The verification ID will NOT be detected if you put it here.
%d bloggers like this: