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BMS 986205

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ChemSpider 2D Image | BMS 986205 | C24H24ClFN2Oimg

BMS 986205

(2R)-N-(4-Chlorophenyl)-2-[cis-4-(6-fluoro-4-quinolinyl)cyclohexyl]propanamide
Cyclohexaneacetamide, N-(4-chlorophenyl)-4-(6-fluoro-4-quinolinyl)-α-methyl-, cis-
Cyclohexaneacetamide, N-(4-chlorophenyl)-4-(6-fluoro-4-quinolinyl)-α-methyl-, cis-(αR)-
(i?)-N-(4-chlorophenyl)-2- c 5-4-(6-fluoroquinolin-4-yl)cyclohexyl)propanamide

CAS: 1923833-60-6

Phase 1 cancer

BMS-986205, ONO-7701,  F- 001287

  • Molecular Formula C24H24ClFN2O
  • Average mass 410.912 Da
  • Originator Bristol-Myers Squibb
  • Class Antineoplastics
  • 01 Feb 2016 Phase-I/II clinical trials in Cancer (Combination therapy, Late-stage disease, Second-line therapy or greater) in Canada (PO) (NCT02658890)
  • 31 Jan 2016 Preclinical trials in Cancer in USA (PO) before January 2016
  • 01 Jan 2016 Bristol-Myers Squibb plans a phase I/IIa trial for Cancer (Late-stage disease, Combination therapy, Second-line therapy or greater) in USA, Australia and Canada (PO) (NCT02658890)
Inventors Hilary Plake Beck, Juan Carlos Jaen, Maksim OSIPOV, Jay Patrick POWERS, Maureen Kay REILLY, Hunter Paul SHUNATONA, James Ross WALKER, Mikhail ZIBINSKY, James Aaron Balog, David K Williams, Jay A MARKWALDER, Emily Charlotte CHERNEY, Weifang Shan, Audris Huang
Applicant Flexus Biosciences, Inc.

Hilary Beck

Hilary Beck

FLX Bio, Inc.EX Principal Investigator, Company NameFLX Bio, Inc., 

CURRENTLY Director, Medicinal Chemistry at IDEAYA Biosciences, IDEAYA Biosciences, The University of Texas at Austin

Image result for Flexus Biosciences, Inc.

Brian Wong

Brian Wong

Chief Executive Officer at FLX Bio, Inc.

Bristol-Myers Squibb, following its acquisition of Flexus Biosciences, is developing BMS-986205 (previously F- 001287), the lead from an immunotherapy program of indoleamine 2,3-dioxygenase 1 (IDO1) inhibitors for the potential treatment of cancer. In February 2016, a phase I/IIa trial was initiated .

BMS-986205 (ONO-7701) is being evaluated at Bristol-Myers Squibb in phase I/II clinical trials for the oral treatment of adult patients with advanced cancers in combination with nivolumab. Early clinical development is also ongoing at Ono in Japan for the treatment of hematologic cancer and for the treatment of solid tumors.

In April 2017, data from the trial were presented at the 108th AACR Annual Meeting in Washington DC. As of February 2017, the MTD had not been reached, but BMS-986205 plus nivolumab treatment was well tolerated, with only two patients discontinuing treatment due to DLTs. The most commonly reported treatment-related adverse events (TRAEs) were decreased appetite, fatigue, nausea, diarrhea, and vomiting. Grade 3 TRAEs were reported in three patients during the combination therapy; however, no grade 3 events were reported during BMS-986205 monotherapy lead-in. No grade 4 or 5 TRAEs were reported with BMS-986205 alone or in combination with nivolumab

Indoleamine 2,3-dioxygenase (IDO; also known as IDOl) is an IFN-γ target gene that plays a role in immunomodulation. IDO is an oxidoreductase and one of two enzymes that catalyze the first and rate-limiting step in the conversion of tryptophan to N-formyl-kynurenine. It exists as a 41kD monomer that is found in several cell populations, including immune cells, endothelial cells, and fibroblasts. IDO is relatively well-conserved between species, with mouse and human sharing 63% sequence identity at the amino acid level. Data derived from its crystal structure and site-directed mutagenesis show that both substrate binding and the relationship between the substrate and iron-bound dioxygenase are necessary for activity. A homolog to IDO (ID02) has been identified that shares 44% amino acid sequence homology with IDO, but its function is largely distinct from that of IDO. (See, e.g., Serafini P, et al, Semin. Cancer Biol, 16(l):53-65 (Feb. 2006) and Ball, H.J. et al, Gene, 396(1):203-213 (Jul. 2007)).

IDO plays a major role in immune regulation, and its immunosuppressive function manifests in several manners. Importantly, IDO regulates immunity at the T cell level, and a nexus exists between IDO and cytokine production. In addition, tumors frequently manipulate immune function by upregulation of IDO. Thus, modulation of IDO can have a therapeutic impact on a number of diseases, disorders and conditions.

A pathophysiological link exists between IDO and cancer. Disruption of immune homeostasis is intimately involved with tumor growth and progression, and the production of IDO in the tumor microenvironment appears to aid in tumor growth and metastasis. Moreover, increased levels of IDO activity are associated with a variety of different tumors (Brandacher, G. et al, Clin. Cancer Res., 12(4): 1144-1151 (Feb. 15, 2006)).

Treatment of cancer commonly entails surgical resection followed by chemotherapy and radiotherapy. The standard treatment regimens show highly variable degrees of long-term success because of the ability of tumor cells to essentially escape by regenerating primary tumor growth and, often more importantly, seeding distant metastasis. Recent advances in the treatment of cancer and cancer-related diseases, disorders and conditions comprise the use of combination therapy incorporating immunotherapy with more traditional chemotherapy and radiotherapy. Under most scenarios, immunotherapy is associated with less toxicity than traditional chemotherapy because it utilizes the patient’s own immune system to identify and eliminate tumor cells.

In addition to cancer, IDO has been implicated in, among other conditions, immunosuppression, chronic infections, and autoimmune diseases or disorders (e.g. , rheumatoid arthritis). Thus, suppression of tryptophan degradation by inhibition of IDO activity has tremendous therapeutic value. Moreover, inhibitors of IDO can be used to enhance T cell activation when the T cells are suppressed by pregnancy, malignancy, or a virus (e.g., HIV). Although their roles are not as well defined, IDO inhibitors may also find use in the treatment of patients with neurological or neuropsychiatric diseases or disorders (e.g., depression).

Small molecule inhibitors of IDO have been developed to treat or prevent IDO-related diseases. For example, the IDO inhibitors 1-methyl-DL-tryptophan; p-(3-benzofuranyl)-DL-alanine; p-[3-benzo(b)thienyl]-DL-alanine; and 6-nitro-L-tryptophan have been used to modulate T cell-mediated immunity by altering local extracellular concentrations of tryptophan and tryptophan metabolites (WO 99/29310). Compounds having IDO inhibitory activity are further reported in WO 2004/094409.

In view of the role played by indoleamine 2,3-dioxygenase in a diverse array of diseases, disorders and conditions, and the limitations (e.g., efficacy) of current IDO inhibitors, new IDO modulators, and compositions and methods associated therewith, are needed.

In April 2017, preclinical data were presented at the 108th AACR Annual Meeting in Washington DC. BMS-986205 inhibited kynurenine production with IC50 values of 1.7, 1.1 and > 2000 and 4.6, 6.3 and > 2000 nM in human (HeLa, HEK293 expressing human IDO-1 and tryptophan-2, 3-dioxygenase cell-based assays) and rat (M109, HEK293 expressing mouse ID0-1 and -2 cell-based assays) respectively. In human SKOV-3 xenografts (serum and tumor) AUC (0 to 24h; pharmacokinetic and pharmacodynamic [PK and PD])) was 0.8, 4.2 and 23 and 3.5, 11 and 40 microM h, respectively; area under the effect curve (PK and PD) was 39, 32 and 41 and 60, 63 and 76% kyn, at BMS-986205 (5, 25 and 125 mg/kg, qd×5), respectively

In April 2017, preclinical data were presented at the 253rd ACS National Meeting and Exhibition in San Francisco, CA. BMS-986205 showed potent and selective inhibition of IDO-1 enzyme (IC50 = 1.7nM) and potent growth inhibition in cellular assays (IC50 = 3.4 nM) in SKOV3 cells. A good pharmacokinetic profile was seen at oral and iv doses in rats, dogs and monkeys. The compound showed good oral exposure and efficacy in in vivo assays

Preclinical studies were performed to evaluate the activity of BMS-986205, a potent and selective optimized indoleamine 2, 3-dioxygenase (IDO)- 1inhibitor, for the treatment of cancer. BMS-986205 inhibited kynurenine production with IC50 values of 1.7, 1.1 and > 2000 and 4.6, 6.3 and > 2000 nM in human (HeLa, HEK293 expressing human IDO-1 and tryptophan-2, 3-dioxygenase cell-based assays) and rat (M109, HEK293 expressing mouse ID0-1 and -2 cell-based assays) respectively. BMS-986205 was also found to be potent when compared with IDO-1from other species (human < dog equivalent monkey equivalent mouse > rat). In cell-free systems, incubation of inhibitor lead to loss of heme absorbance of IDO-1 which was observed in the presence of BMS-986205 (10 microM), while did not observed with epacadostat (10 microM). The check inhibitory activity and check reversibility (24 h after compound removal) of BMS-986205 was found to be < 1 and 18% in M109 (mouse) and < 1 and 12% SKOV3 (human) cells, respectively. In human whole blood IDO-1, human DC mixed lymphocyte reaction and human T cells cocultured with SKOV3 cells- cell based assays, BMS-986205 showed potent cellular effects (inhibition of kynurenine and T-cell proliferation 3H-thymidine) with IC50 values of 2 to 42 (median 9.4 months), 1 to 7 and 15 nM, respectively. In human SKOV-3 xenografts (serum and tumor) AUC (0 to 24h; pharmacokinetic and pharmacodynamic [PK and PD])) was 0.8, 4.2 and 23 and 3.5, 11 and 40 microM h, respectively; area under the effect curve (PK and PD) was 39, 32 and 41 and 60, 63 and 76% kyn, at BMS-986205 (5, 25 and 125 mg/kg, qd×5), respectively. In vivo human-SKOV3 and hWB-xenografts, IC50 values of BMS-986205 were 3.4 and 9.4 NM, respectively. The ADME of BMS-986205 at parameters iv/po dose was 0.5/2, 0.5/1.5 and 0.5/1.2 mg/kg, respectively; iv/clearance was 27, 25 and 19 ml, min/kg, respectively; iv Vss was 3.8, 5.7 and 4.1 l/kg, respectively; t1/2 (iv) was 3.9, 4.7 and 6.6 h, respectively; fraction (po) was 64, 39 and 10%, respectively. At the time of presentation, BMS-986205 was being evaluated in combination with nivolumab.

The chemical structure and preclinical profile was presented for BMS-986205 ((2R)-N-(4-Chlorophenyl)-2-[cis-4-(6-fluoroquinolin-4-yl)cyclohexyl]propanamide), a potent IDO-1 inhibitor in phase I for the treatment of cancer. This compound showed potent and selective inhibition of IDO-1 enzyme (IC50 = 1.7nM) and potent growth inhibition in cellular assays (IC50 = 3.4 nM) in SKOV3 cells. The pharmacokinetic profile in rats dosed at 0.5 mg/kg iv and 2 mg/kg po, with clearance, Vss, half-life and bioavailability of 27 ml/min/kg, 3.8 l/kg, 3.9 h and 4%, respectively; in dogs at 0.5 iv and 1.5 po mg/kg dosing results were 25 ml/min/kg, 5.7 l/kg, 4.7 h and 39%; and, in cynomolgus monkeys with the same doses as dogs results were 19 ml/min/kg, 4.1 l/kg, 6.6 h and 10%, respectively. The compound showed good oral exposure and efficacy in in vivo assays.

BMS-986158: a BET inhibitor for cancerAshvinikumar Gavai of Bristol Myers Squibb (BMS) gave an overview of his company’s research into Bromodomian and extra-terminal domain (BET) as oncology target for transcriptional suppression of key oncogenes, such as MYC and BCL2. BET inhibition has been defined as strong rational strategy for the treatment of hematologic malignancies and solid tumors. From crystal-structure guided SAR studies, BMS-986158, 2-{3-(1,4-Dimethyl-1H-1,2,3-triazol-5-yl)-5-[(S)-(oxan-4-yl)(phenyl)methyl]-5H-pyrido[3,2-b]indol-7-yl}propan-2-ol, was chosen as a potent BET inhibitor, showing IC50 values for BRD2, BRD3 and BRD4 activity of 1 nM; it also inhibited Myc oncogene (IC50 = 0.5 nM) and induced chlorogenic cancer cell death. In vitro the compound also displayed significant cytotoxicity against cancer cells.  When administered at 0.25, 0.5 and 1 mg/kg po, qd to mice bearing human lung H187 SCLC cancer xenograft, BMS-986158 was robust and showed efficacy as a anticancer agent at low doses. In metabolic studies, it showed t1/2 of 36, 40 and 24 min in human, rat and mice, respectively, and it gave an efflux ratio of 3 in Caco-2 permeability assay. In phase 1/II studies, BMS-986158 was well tolerated at efficacious doses and regimens, and drug tolerable toxicity at efficacy doses and regimens. Selective Itk inhibitors for inflammatory disordersThe development of highly selective Itk inhibitors for the treatment of diseases related to T-cell function, such as inflammatory disorders, was described by Shigeyuki Takai (Ono Pharmaceutical). Inhibitory properties of a hit compound, ONO-8810443, were modified via X-ray structure and Molecular Dynamics stimulation to get ONO-212049 with significant kinase selectivity (140-fold) against Lck, a tyrosine kinase operating upstream of Itk in the TCR cascade. Further modifications identified final lead compound ONO-7790500 (N-[6-[3-amino-6-[2-(3-methoxyazetidin-1-yl)pyridin-4-yl]pyrazin-2-yl]pyridin-3-yl]-1-(3-methoxyphenyl)-2,3-dimethyl-5-oxopyrazole-4-carboxamide), which selectively inhibited Itk (IC50 = < 0.004 microM) over Lck (IC50 = 9.1 microM; SI 2000-fold) and suppressed Jurkat T-cell proliferation (IC50 = 0.014 microM). This compound suppressed alphaCD3/CDP28 CD4+T-cell stimulation (IC50 = 0.074 microM) with selectivity over PMA/Ionomycin (IC50 = > 10 microM). ONO-7790500 also exhibited in vivo IL-2 inhibitory properties (62% inhibition at 30 mg/kg po) in mice. In pharmacokinetic studies in balb/c mice, the compound administered orally (10 mg/kg) showed a Cmax of 1420 ng/ml, AUClast of 11,700 ng*h/ml, t1/2 of 5.3 h and oral bioavailability of 68%. Administration iv at 0.3 mg/kg gave an AUC last of 610 ng*h/ml, t1/2 of 3.8 h, Vss of 1260 ml/kg and Cl of 5.1 ml/min/kg. ADMET data showed ONO-7790500 did not have relevant activity in cytochromes and hERG channels (IC50 > 10 microM) in toxicological studies, and gave a PAMPA value of 5.0 x 10(-6) cm/s. Fused imidazole and pyrazole derivatives as TGF-beta inhibitorsDual growth and differentiation factor-8 (GDF-8; also known as myostatin) and TGF-beta inhibitors were described. Both targets belong to TGF-beta superfamily consisting of a large group of structurally related cell regulatory proteins involved in fundamental biological and pathological processes, such as cell proliferation or immunomodulation. Myostatin (GDF8) is a negative regulator negative regulator of skeletal muscle growth and has also been related to bone metabolism. Investigators at Rigel Pharmaceuticals found that compounds designed to be GDF-8 inhibitors were able to inhibit TGF-beta as well, this could be an advantage for the treatment of diseases associated with muscle and adipose tissue disorders, as well as potentially immunosuppressive disorders. Jiaxin Yu from the company described  new fused imidazole derivatives, of which the best compound was 6-[2-(2,4,5-Trifluorophenyl)-6,7-dihydro-5H-pyrrolo[1,2-a]imidazol-3-yl]quinoxaline. This compound was very potent at TGF-beta Receptor Type-1 (ALK5) inhibition with an IC50 value of 1nM. In an in vivo mouse assay this compound showed good activity at 59.7 mg/kg, po, and good plasma exposure; inhibition of GDF-8 and TGFbeta growth factors was 90 and 81.6 %, respectively.Rigel’s Ihab Darwish described a series of fused pyrazole derivatives, with the best compound being 6-[2-(2,4-Difluorophenyl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl][1,2,4]triazolo[1,5-a]pyridine. This compound showed an IC50 of 0.06 and 0.23 microM for GDF-8 and TGFbeta, respectively, in the pSMAD (MPC-11) signaling inhibition test. The compound had a good pharmacokinetic profile, with 40% of bioavailability in mice after a 5-mg/kg po dose. An iv dose of 1 mg/kg showed t1/2 of 0.7 h and Vss of 1.0 l/h/kgDiscovery of selective inhibitor of IDO BMS-986205 for cancerIndoleamine-2,3-dioxygenase (IDO)-1 enzyme initiates and regulates the first step of the kynurenine pathway (KP) of tryptophan metabolism, and evidence has shown that overexpression of IDO-1 in cancer tumors is a crucial mechanism facilitating tumor immune evasion and persistence. The chemical structure and preclinical profile of BMS-986205 was presented by Aaron Balog from BMS. BMS-986205 ((2R)-N-(4-Chlorophenyl)-2-[cis-4-(6-fluoroquinolin-4-yl)cyclohexyl]propanamide),  is a potent IDO-1 inhibitor in phase I for the treatment of cancer. This compound showed potent and selective inhibition of IDO-1 enzyme (IC50 = 1.7nM) and potent growth inhibition in cellular assays (IC50 = 3.4 nM) in SKOV3 cells. The pharmacokinetic profile in rats dosed at 0.5 mg/kg iv and 2 mg/kg po, with clearance, Vss, half-life and bioavailability of 27 ml/min/kg, 3.8 l/kg, 3.9 h and 4%, respectively; in dogs at 0.5 iv and 1.5 po mg/kg dosing results were 25 ml/min/kg, 5.7 l/kg, 4.7 h and 39%; and, in cynomolgus monkeys with the same doses as dogs results were 19 ml/min/kg, 4.1 l/kg, 6.6 h and 10%, respectively. The compound showed good oral exposure and efficacy in in vivo assays.Three further reports have been published from this meeting .The website for this meeting can be found at https://www.acs.org/content/acs/en/meetings/spring-2017.html.

SYNTHESIS

1 Wittig  NaH

2 REDUCTION H2, Pd, AcOEt, 4 h, rt, 50 psi

3 Hydrolysis HCl, H2O, Me2CO, 2 h, reflux

4  4-Me-2,6-(t-Bu)2-Py, CH2Cl2, overnight, rt

5 SUZUKI AcOK, 72287-26-4, Dioxane, 16 h, 80°C

6  Heck Reaction,  Suzuki Coupling, Hydrogenolysis of Carboxylic Esters, Reduction of Bonds, HYDROGEN

7 Et3N, THF, rt – -78°C , Pivaloyl chloride, 15 min, -78°C; 1 h, 0°C ,THF, 0°C – -78°C, BuLi, Me(CH2)4Me, 15 min, -78°C, R:(Me3Si)2NH •Na, THF, 10 min, -50°C , HYDROLYSIS,  (PrP(=O)O)3, C5H5N, AcOEt, 5 min, rt

Patent

WO2016073770

https://patentscope.wipo.int/search/en/detail.jsf;jsessionid=289DBE79BEFC6ADC558C89E7A74B19DB.wapp2nB?docId=WO2016073770&recNum=1&maxRec=&office=&prevFilter=&sortOption=&queryString=&tab=PCTDescription

Example 19

(i?)-N-(4-chlorophenyl)-2- c 5-4-(6-fluoroquinolin-4-yl)cyclohexyl)propanamide

Example 19 : (i?)-N-(4-chlorophenyl)-2-(cz5-4-(6-fluoroquinolin-4- yl)cyclohexyl)propanamide

[0277] Prepared using General Procedures K, B, E, L, M, N, and O. General Procedure L employed 2-(4-(6-fluoroquinolin-4-yl)-cyclohexyl)acetic acid (mixture of

diastereomers), and ( ?)-2-phenyl-oxazolidinone. General Procedure M employed the cis product and iodomethane. The auxiliary was removed following General Procedure N and the desired product formed employing General Procedure O with 4-chloroaniline.

Purified using silica gel chromatography (0% to 100% ethyl acetate in hexanes) to afford Example 19. 1H NMR of czs-isomer (400 MHz; CDC13): δ 9.14 (s, 1H), 8.70 (d, J= 4.6 Hz, 1H), 8.06 (dd, J= 9.2 Hz, J= 5.6 Hz, 1H), 7.58-7.64 (m, 3H), 7.45 (ddd, J= 9.3 Hz, J= 7.8 Hz, J= 2.7 Hz, 1H), 7.19-7.24 (m, 2H), 7.15 (d, J= 4.6Hz, 1H), 3.16-3.26 (m, 1H), 2.59-2.69 (m, 1H), 2.08-2.16 (m, 1H), 1.66-1.86 (m, 7H), 1.31-1.42 (m, 1H), 1.21 (d, J= 6.8Hz, 3H) ppm. m/z 411.2 (M+H)+.

REFERENCES

23-Feb-2015
Bristol-Myers Squibb To Expand Its Immuno-Oncology Pipeline with Agreement to Acquire Flexus Biosciences, Inc
Bristol-Myers Squibb Co; Flexus Biosciences Inc

17-Dec-2014
Flexus Biosciences, a Cancer Immunotherapy Company Focused on Agents for the Reversal of Tumor Immunosuppression (ARTIS), Announces $38M Financing
Flexus Biosciences Inc

2015106thApril 21Abs 4290
Potent and selective next generation inhibitors of indoleamine-2,3-dioxygenase (IDO1) for the treatment of cancer
American Association for Cancer Research Annual Meeting
Jay P. Powers, Matthew J. Walters, Rajkumar Noubade, Stephen W. Young, Lisa Marshall, Jan Melom, Adam Park, Nick Shah, Pia Bjork, Jordan S. Fridman, Hilary P. Beck, David Chian, Jenny V. McKinnell, Maksim Osipov, Maureen K. Reilly, Hunter P. Shunatona, James R. Walker, Mikhail Zibinsky, Juan C. Jaen

2017108thApril 04Abs 4964
Structure, in vitro biology and in vivo pharmacodynamic characterization of a novel clinical IDO1 inhibitor
American Association for Cancer Research Annual Meeting
John T Hunt, Aaron Balog, Christine Huang, Tai-An Lin, Tai-An Lin, Derrick Maley, Johnni Gullo-Brown, Jesse Swanson, Jennifer Brown

2017253rdApril 05Abs MEDI 368
Discovery of a selective inhibitor of indoleamine-2,3-dioxygenase for use in the therapy of cancer
American Chemical Society National Meeting and Exposition
Aaron Balog

April 2-62017
American Chemical Society – 253rd National Meeting and Exhibition (Part IV) – OVERNIGHT REPORT, San Francisco, CA, USA
Casellas J, Carceller V

Juan Jaen

Juan Jaen

Jordan Fridman

Jordan Fridman

Chief Scientific Officer at FLX Bio, Inc.

Rekha Hemrajani

Rekha Hemrajani

Chief Operating Officer at FLX Bio, Inc

Max Osipov

Max Osipov

////////////////PHASE 1, BMS 986205, 1923833-60-6, BMS-986205, ONO-7701,Bristol-Myers Squibb,  Antineoplastics,  F- 001287

 C[C@H]([C@H]1CC[C@@H](C2=CC=NC3=CC=C(F)C=C23)CC1)C(NC4=CC=C(Cl)C=C4)=O

Wrapping up ‘s 1st time disclosures is Aaron Balog of @bmsnews talking about an IOD-1 inhibitor to treat cancer

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DR ANTHONY CRASTO

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DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO Ph.D

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 29 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 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 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 29 year tenure till date Aug 2016, Around 30 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, 25 Lakh plus views on dozen plus blogs, He makes himself available to all, contact him on +91 9323115463, email amcrasto@gmail.com, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 13 lakh plus views on New Drug Approvals Blog in 212 countries......https://newdrugapprovals.wordpress.com/ , 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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