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Ixabepilone for breast cancer



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Ixabepilone, 219989-84-1 cas


Ixabepilone (INN; also known as azaepothilone B, codenamed BMS-247550) is an epothilone B analog developed byBristol-Myers Squibb as a chemotherapeutic medication for cancer.

It is produced by Sorangium cellulosum.

It acts to stabilize microtubules. It is highly potent agent, capable of damaging cancer cells in very low concentrations, and retains activity in cases where tumor cells are insensitive to paclitaxel.

On October 16, 2007, the U.S. Food and Drug Administration approved ixabepilone for the treatment of aggressive metastaticor locally advanced breast cancer no longer responding to currently available chemotherapies. In November 2008, the EMEAhas refused a marketing authorisation for Ixabepilone.

Ixabepilone is administered through injection, and is marketed under the trade name Ixempra.

patent        approval    expiry

United States 7312237 2004-08-21 2024-08-21
United States 6605599 1998-05-26 2018-05-26
Applicant Tradename Generic Name Dosage NDA Approval Date Type RLD US Patent No.
Bristol Myers Squibb
INJECTABLE;IV (INFUSION) 022065 Oct 16, 2007 RX Yes RE41911*PED  
Bristol Myers Squibb
INJECTABLE;IV (INFUSION) 022065 Oct 16, 2007 RX Yes RE41393*PED  
Bristol Myers Squibb
INJECTABLE;IV (INFUSION) 022065 Oct 16, 2007 RX Yes 7,312,237*PED  
Bristol Myers Squibb
INJECTABLE;IV (INFUSION) 022065 Oct 16, 2007 RX Yes 7,125,899*PED  
Patent No Patent Expiry patent use code
6670384 Jan 23, 2022 U-959
6670384 Jan 23, 2022 U-960
6670384*PED Jul 23, 2022
7022330 Jan 23, 2022 U-958
7022330*PED Jul 23, 2022
7125899 May 26, 2018 U-957
7125899*PED Nov 26, 2018
7312237 Aug 21, 2024 U-965
7312237*PED Feb 21, 2025
RE41393 Feb 8, 2022 U-961
RE41393*PED Aug 8, 2022
RE41911 Sep 28, 2020 U-961
RE41911*PED Mar 28, 2021
Exclusivity Code ExclusivityDate
NCE Oct 16, 2012
PED Apr 18, 2015
M-61 Oct 18, 2014
PED Apr 16, 2013
Exclusivity Code ExclusivityDate
NCE Oct 16, 2012

Ixabepilone, in combination with capecitabine, has demonstrated effectiveness in the treatment of metastatic or locally advanced breast cancer in patients after failure of an anthracycline and a taxane.

It has been investigated for use in treatment of non-Hodgkin’s lymphoma. In pancreatic cancer phase two trial it showed some promising results (used alone). Combination therapy trials are ongoing.

Ixabepilone is an anti cancer agent acting as a microtubule inhibitor, and which in particular are efficient in the treatment of cancer not reacting to other anti cancer agents, such as e.g. paclitaxel. Ixabepilone is marketed under the trade name Ixempra® and are approved for the treatment of aggressive metastatic or locally advanced breast cancer which not responding to the current prevailing chemotherapies.

Ixabepilone known under the CAS no. 219989-84-1 has the following structure:

Figure imgf000002_0001


Ixabepilone may be prepared from a starting material named epothilone B having the structural formula:

Figure imgf000002_0002

Epothilone B Ixabepilone as a compound is described in the USRE4191 1. USRE4191 1 furthermore disclose a process for synthesizing Ixabepilone.

The US 6,365,749 describes a process for making ixabepilone by reacting epothilone B with a palladium catalyst in the presence of a nucleophilic donor.

The USRE39356 do also describe a process for making Ixabepilone by reacting epothilone B with an azide donor agent and a reducing agent in the presence of a phase transfer catalyst and a palladium catalyst.

Ixabepilone  is the treatment of metastatic and advanced breast cancer drugs.Ixabepilone as anticancer drugs alone or in combination with capecitabine (Capecitabine) in combination. October 16, 2007 approved for marketing by the FDA, trade name Ixempra, by the Bristol-Myers Squibb Company’s development.
Ixabepilone is an anti-mitotic drugs that are inhibitors of tubulin, the mechanism and paclitaxel (Taxol) the same class of drugs. Epothilone (Epothilone) by colistin (myxobacterium) Sorangium cellulosum fermentation of several macrolide metabolites in general. Anticancer activity in vitro experiments, epothilone A and epothilone B showed good activity, even in the paclitaxel-resistant cells also showed good activity. But its activity in vivo experiments in general, this is probably due to the body of the ester hydrolases that macrolide ring opening induced inactivation. In a series of epothilone derivatives activity test, it was found with the lactam bond instead of the original product of ester bonds – ixabepilone anticancer activity can be well retained.
Ixabepilone is epothilone B semi-synthetic derivatives. Epothilone B is a macrocyclic lactone, a hydroxyl moiety is allyl alcohol, the Pd catalyst can be obtained by ring-opening Pd complexes 1 , 1 received azide nucleophile attacking the anion generated with three azide product phosphorus reduction to give methyl amino acids 2 . Here we must point out that the attack was completely azide stereoselectivity, which is determined by two consecutive trans-attack lead, Pd (0)-trans lactone generate offensive allyl Pd complexes, to accept anti-azide anion type attack, to maintain the configuration of the product obtained. Amino acids 2 HoBt and EDCI generated by an amide bond to get ixabepilone.
Ixabepilone (Ixabepilone) - natural product derived anticancer drugs

IXEMPRA (ixabepilone) is a microtubule inhibitor belonging to a class of antineoplastic agents, the epothilones and their analogs. The epothilones are isolated from the myxobacterium Sorangium cellulosum. Ixabepilone is a semisynthetic analog of epothilone B, a 16-membered polyketide macrolide, with a chemically modified lactam substitution for the naturally existing lactone.

The chemical name for ixabepilone is (1S,3S,7S,10R,11S,12S,16R)-7,11dihydroxy-8,8,10,12,16-pentamethyl-3-[(1E)-1-methyl-2-(2-methyl-4-thiazolyl)ethenyl]17-oxa-4-azabicyclo[14.1.0] heptadecane-5,9-dione, and it has a molecular weight of 506.7. Ixabepilone has the following structural formula:

IXEMPRA® Kit (ixabepilone)  Structural Formula Illustration

IXEMPRA (ixabepilone) for injection is intended for intravenous infusion only after constitution with the supplied DILUENT and after further dilution with a specified infusion fluid . IXEMPRA (ixabepilone) for injection is supplied as a sterile, non-pyrogenic, single-use vial providing 15 mg or 45 mg ixabepilone as a lyophilized white powder. The DILUENT for IXEMPRA is a sterile, non-pyrogenic solution of 52.8% (w/v) purified polyoxyethylated castor oil and 39.8% (w/v) dehydrated alcohol, USP. The IXEMPRA (ixabepilone) for injection and the DILUENT for IXEMPRA are co-packaged and supplied as IXEMPRA Kit.




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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 PHARMACEUTICALS 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 year tenure till date Dec 2017, 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, 50 Lakh plus views on dozen plus blogs, 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 19 lakh plus views on New Drug Approvals Blog in 216 countries...... , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc

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