4-(2-(6-Methylpyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)quinolin-6-carboxamide monohydrate 

Anal. Calcd for C₂₂H₁₉N₅O·H₂O: C, 68.20; H, 5.46; N, 18.08. Found: C, 68.18; H, 5.34; N, 17.90.

¹H NMR (DMSO-d₆: δ) 1.74 (s, 3H), 2.63 (m, 2H), 2.82 (br s, 2H), 4.30 (t, J = 7.2 Hz, 2H), 6.93 (m, 1H), 7.37 (s, 1H), 7.41 (d, J = 4.4 Hz, 1H), 7.56 (m, 1H), 7.58 (m, 1H), 8.04, (s, 1H), 8.04 (d, J = 4.4 Hz, 1H), 8.12 (dd, J = 8.8, 1.6 Hz, 1H), 8.25 (d, J = 2.0 Hz, 1H), 8.87 (d, J = 4.4 Hz, 1H).

¹³C NMR (DMSO-d₆: δ) 22.56, 23.24, 25.58, 48.01, 109.36, 117.74, 121.26, 122.95, 126.73, 127.16 (2C), 129.01, 131.10, 136.68, 142.98, 147.20, 148.99, 151.08, 151.58, 152.13, 156.37, 167.47.

IR (KBr): 3349, 3162, 3067, 2988, 2851, 1679, 1323, 864, 825 cm^–1.

HRMS (m/z M + 1): Calcd for C₂₂H₁₉N₅O: 370.1653. Found: 370.1662.

• OriginatorEli Lilly
• DeveloperEli Lilly; National Cancer Institute (USA); Vanderbilt-Ingram Cancer Center; Weill Cornell Medical College
• ClassAntineoplastics; Pyrazoles; Pyridines; Pyrroles; Quinolines; Small molecules
• Mechanism of ActionPhosphotransferase inhibitors; Transforming growth factor beta1 inhibitors
• • Phase II/IIIMyelodysplastic syndromes
  • Phase IIBreast cancer; Glioblastoma; Hepatocellular carcinoma
  • Phase I/IIGlioma; Non-small cell lung cancer; Pancreatic cancer
  • Phase ICancer; Solid tumours

  Most Recent Events

  • 26 Apr 2016Eli Lilly plans a pharmacokinetics phase I trial in Healthy volunteers in United Kingdom (PO) (NCT02752919)
  • 16 Apr 2016Pharmacodynamics data from a preclinical study in Cancer presented at the 107th Annual Meeting of the American Association for Cancer Research (AACR-2016)
  • 06 Apr 2016Eli Lilly and AstraZeneca plan a phase Ib trial for Pancreatic cancer (Second-line therapy or greater, Metastatic disease, Recurrent, Combination therapy) in USA, France, Italy, South Korea and Spain (PO) (NCT02734160)

Bristol-Myers Squibb and Lilly Enter Clinical Collaboration Agreement to Evaluate Opdivo (nivolumab) in Combination with Galunisertib in Advanced Solid Tumors

NEW YORK & INDIANAPOLIS–(BUSINESS WIRE)– Bristol-Myers Squibb Company (NYSE:BMY) and Eli Lilly and Company (NYSE:LLY) announced today a clinical trial collaboration to evaluate the safety, tolerability and preliminary efficacy of Bristol-Myers Squibb’s immunotherapy Opdivo (nivolumab) in combination with Lilly’s galunisertib (LY2157299). The Phase 1/2 trial will evaluate the investigational combination of Opdivo and galunisertib as a potential treatment option for patients with advanced (metastatic and/or unresectable) glioblastoma, hepatocellular carcinoma and non-small cell lung cancer.

Opdivo is a human programmed death receptor-1 (PD-1) blocking antibody that binds to the PD-1 receptor expressed on activated T-cells. Galunisertib (pronounced gal ue” ni ser’tib) is a TGF beta R1 kinase inhibitor that in vitro selectively blocks TGF beta signaling. TGF beta promotes tumor growth, suppresses the immune system and increases the ability of tumors to spread in the body. This collaboration will address the hypothesis that co-inhibition of PD-1 and TGF beta negative signals may lead to enhanced anti-tumor immune responses than inhibition of either pathway alone.

“Advanced solid tumors represent a serious unmet medical need among patients with cancer,” said Michael Giordano, senior vice president, Head of Development, Oncology, Bristol-Myers Squibb. “Our clinical collaboration with Lilly underscores Bristol-Myers Squibb’s continued commitment to explore combination regimens from our immuno-oncology portfolio with other mechanisms of action that may accelerate the development of new treatment options for patients.”

“Combination therapies will be key to addressing tumor heterogeneity and the inevitable resistance that is likely to develop to even the most promising new tailored therapies,” said Richard Gaynor, M.D., senior vice president, Product Development and Medical Affairs, Lilly Oncology. “To that end, having multiple cancer pathways and technology platforms will be critical in an era of combinations to ensure sustainability beyond any single asset.”

The study will be conducted by Lilly. Additional details of the collaboration were not disclosed.

About Galunisertib

Galunisertib (pronounced gal ue” ni ser’tib) is Lilly’s TGF beta R1 kinase inhibitor that in vitro selectively blocks TGF beta signaling. TGF beta promotes tumors growth, suppresses the immune system, and increases the ability of tumors to spread in the body.

Immune function is suppressed in cancer patients, and TGF beta worsens immunosuppression by enhancing the activity of immune cells called T regulatory cells. TGF beta also reduces immune proteins, further decreasing immune activity in patients

Galunisertib is currently under investigation as an oral treatment for advanced/metastatic malignancies, including Phase 2 evaluation in hepatocellular carcinoma, myelodysplastic syndromes (MDS), glioblastoma, and pancreatic cancer.

PATENT

WO 2004048382

The disclosed invention also relates to the select compound of Formula II:

Formula II

2-(6-methyl-pyridin-2-yI)-3-[6-amido-quinolin-4-yl)-5,6-dihydro-4H-pyrrolo[l,2- bjpyrazole and the phannaceutically acceptable salts thereof.

The compound above is genetically disclosed and claimed in PCT patent application PCT/US02/11884, filed 13 May 2002, which claims priority from U.S. patent application U. S . S .N. 60/293 ,464, filed 24 May 2001 , and incorporated herein by reference. The above compound has been selected for having a surprisingly superior toxicology profile over the compounds specifically disclosed in application cited above.

The following scheme illustrates the preparation of the compound of Formula II.

Scheme II

Cs₂C0₃

The following examples further illustrate the preparation of the compounds of this invention as shown schematically in Schemes I and II. Example 1

Preparation of 7-(2-morpholin-4-yI-ethoxy)-4-(2-pyridin-2-yl-5,6-dihydro-4H- pyrroIo[l,2-b]pyrazol-3-yl)-q inoline

A. Preparation of 4-(2-pyridin-2-yl-5,6-dihydro-4H-pyrrolo[l,2-b]pyrazol-3-yl)- 7-[2-(tetrahydropyran-2-yIoxy)ethoxy]quinoIine

Heat 4-(2-pyridm-2-yl-5,6-dihydro-4H-pyrrolo[l,2-b]pyrazol-3-yl)-quinolin-7-ol (376 mg, 1.146 mmol), cesium carbonate (826 mg, 2.54 mmol), and 2-(2- bromoethoxy)tetrahydro-2H-pyran (380 μL, 2.52 mmol) in DMF (5 mL) at 120 °C for 4 hours. Quench the reaction with saturated sodium chloride and then extract with chloroform. Dry the organic layer over sodium sulfate and concentrate in vacuo. Purify the reaction mixture on a silica gel column eluting with dichloromethane to 10% methanol in dichloromethane to give the desired subtitled intermediate as a yellow oil (424 mg, 81%). MS ES⁺m/e 457.0 (M+l).

EXAMPLE 2

Preparation of 2-(6-methyl-pyridin-2-yl)-3-[6-amido-quinolin-4-yl)-5,6-dihydro-4H-pyrrolo[l,2- b]pyrazole

A. Preparation of 6-bromo-4-methyI-quinoline

Stir a solution of 4-bromo-phenylamine (1 eq), in 1,4-dioxane and cool to approximately 12 °C. Slowly add sulfuric acid (2 eq) and heat at reflux. Add methyl vinyl ketone (1.5 eq) drop wise into the refluxing solution. Heat the solution for 1 hour after addition is complete. Evaporate the reaction solution to dryness and dissolve in methylene chloride. Adjust the solution to pH 8 with 1 M sodium carbonate and extract three times with water. Chromatograph the residue on SiO (70/30 hexane/ethyl acetate) to obtain the desired subtitled inteπnediate. MS ES+ m e = 158.2 (M+l). B. Preparation of 6-methyl-pyridine-2-carboxylic acid methyl ester

Suspend 6-methyl-pyridine-2-carboxylic acid (10 g, 72.9 mmol) in methylene chloride (200 mL). Cool to 0 °C. Add methanol (10 mL), 4-dimethylaminopyridine (11.6 g, 94.8 mmol), and l-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC)

(18.2 g, 94.8 mmol). Stir the mixture at room temperature for 6 hours, wash with water and brine, and dry over sodium sulfate. Filter the mixture and concentrate in vacuo.

Chromatograph the residue on SiO₂ (50% ethyl acetate/hexanes) to obtain the desired subtitled intermediate, 9.66 g (92%), as a colorless liquid. 1H NMR (CDC1₃) 6 7.93-7.88 (m, IH), 7.75-7.7 (m, IH), 7.35-7.3 (m, IH), 4.00 (s, 3H), 2.60 (s, 3H).

C. Preparation of 2-(6-bromo-quinoIin-4-yl)-l-(6-methyl-pyridin-2-yl)-ethanone Dissolve 6-bromo-4-methyl-quinoline (38.5 g, 153 mmol) in 600 mL dry THF.

Cool to -70° C and treat with the dropwise addition of 0.5 M potassium hexamethyldisilazane (KN(SiMe )₂ (400 mL, 200 mmol) over 2 hours while keeping the temperature below -65 °C. Stir the resultant solution at -70°C for 1 hour and add a solution of 6-methylpyridine-2-carboxylic acid methyl ester (27.2, 180 mmol) in 100 mL dry THF dropwise over 15 minutes. During the addition, the mixture will turn from dark red to pea-green and form a precipitate. Stir the mixture at -70°C over 2 hours then allow it to warm to ambient temperature with stirring for 5 hours. Cool the mixture then quench with 12 N HC1 to pH=l . Raise the pH to 9 with solid potassium carbonate. Decant the solution from the solids and extract twice with 200 mL ethyl acetate. Combine the organic extracts, wash with water and dry over potassium carbonate. Stir the solids in 200 mL water and 200 mL ethyl acetate and treat with additional potassium carbonate. Separate the organic portion and dry with the previous ethyl acetate extracts. Concentrate the solution in vacuo to a dark oil. Pass the oil through a 300 mL silica plug with methylene chloride then ethyl acetate. Combine the appropriate fractions and concentrate in vacuo to yield an amber oil. Rinse the oil down the sides of the flask with methylene chloride then dilute with hexane while swirling the flask to yield 38.5 g (73.8 %) of the desired subtitled intermediate as a yellow solid. MS ES+ = 341 (M+l)v D. Preparation of l-[2-(6-bromo-quinolin-4-yI)-l-(6-methyl-pyridin-2-yl)- ethylideneamino]-pyrrolidin-2-one

Stir a mixture of 2-(6-bromo-quinolin-4-yl)-l-(6-methyl-pyridin-2-yl)-ethanone (38.5 g, 113 mmol) and 1-aminopyrrolidinone hydrochloride (20 g, 147 mmol) in 115 mL pyridine at ambient temperature for 10 hours. Add about 50 g 4 A unactivated sieves. Continue stirring an additional 13 h and add 10-15 g silica and filter the mixture through a 50 g silica plug. Elute the silica plug with 3 L ethyl acetate. Combine the filtrates and concentrate in vacuo. Collect the hydrazone precipitate by filtration and suction dry to yield 33.3 g (69.7%) of the desired subtitled intermediate as an off-white solid. MS ES⁺ = 423 (M+l).

E. Preparation of 6-bromo-4-[2-(6-methyl-pyridin-2-yι)-5,6-dihydro-4H- pyrrolo[l,2-b]pyrazol-3-yl]-quinoline

To a mixture of (1.2 eq.) cesium carbonate and l-[2-(6-bromo-qumolin-4-yl)-l- (6-methyl-pyridin-2-yl)-ethylideneamino]-pyrrolidin-2-one (33.3 g, 78.7 mmol) add 300 mL dry N,N-dimethylformamide. Stir the mixture 20 hours at 100°C. The mixture may turn dark during the reaction. Remove the N,N-dimethylformamide in vacuo. Partition the residue between water and methylene chloride. Extract the aqueous portion with additional methylene chloride. Filter the organic solutions through a 300 mL silica plug, eluting with 1.5 L methylene chloride, 1.5 L ethyl acetate and 1.5 L acetone. Combine the appropriate fractions and concentrate in vacuo. Collect the resulting precipitate by filtration to yield 22.7 g (71.2%) of the desired subtitled intermediate as an off-white solid. MS ES⁺ = 405 (M+l).

F. Preparation of 4-[2-(6-methyl-pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[l,2- b]pyrazol-3-yl]-quinoline-6-carboxylic acid methyl ester

Add 6-bromo-4-[2-(6-methyl-pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[l,2- b]pyrazol-3-yl]-quinoline (22.7 g, 45 mmol) to a mixture of sodium acetate (19 g, 230 mmol) and the palladium catalyst [1,1 ‘- bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with dichloromethane (1:1) (850 mg, 1.04 mmol) in 130 mL methanol. Place the mixture under 50 psi carbon monoxide atmosphere and stir while warming to 90° C over 1 hour and with constant charging with additional carbon monoxide. Allow the mixture to cool over 8 hours, recharge again with carbon monoxide and heat to 90 °C. The pressure may rise to about 75 PSI. The reaction is complete in about an hour when the pressure is stable and tic (1 : 1 toluene/acetone) shows no remaining bromide. Partition the mixture between methylene chloride (600 mL) and water (1 L). Extract the aqueous portion with an additional portion of methylene chloride (400 mL.) Filter the organic solution through a 300 mL silica plug and wash with 500 mL methylene chloride, 1200 mL ethyl acetate and 1500 mL acetone. Discard the acetone portion. Combine appropriate fractions and concentrate to yield 18.8 g (87.4%) of the desired subtitled intermediate as a pink powder. MS ES⁺ = 385 (M+l).

G. Preparation of 2-(6-methyl-pyridin-2-yl)-3-[6-amido-quinolin-4-yι)-5,6- dihydro-4H-pyrrolo[l,2-b]pyrazole

Warm a mixture of 4-[2-(6-methyl-pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[l,2- b]pyrazol-3-yl]-quinolme-6-carboxylic acid methyl ester in 60 mL 7 N ammonia in methanol to 90 °C in a stainless steel pressure vessel for 66 hours. The pressure will rise to about 80 PSI. Maintain the pressure for the duration of the reaction. Cool the vessel and concentrate the brown mixture in vacuo. Purify the residual solid on two 12 g Redi- Pak cartridges coupled in series eluting with acetone. Combine appropriate fractions and concentrate in vacuo. Suspend the resulting nearly white solid in methylene chloride, dilute with hexane, and filter. The collected off-white solid yields 1.104 g (63.8%) of the desired title product. MS ES⁺ = 370 (M+l).

PAPER

http://pubs.acs.org/doi/abs/10.1021/op4003054

Application of Kinetic Modeling and Competitive Solvent Hydrolysis in the Development of a Highly Selective Hydrolysis of a Nitrile to an Amide

Abstract

A combination of mechanism-guided experimentation and kinetic modeling was used to develop a mild, selective, and robust hydroxide-promoted process for conversion of a nitrile to an amide using a substoichiometric amount of aqueous sodium hydroxide in a mixed water and N-methyl-2-pyrrolidone solvent system. The new process eliminated a major reaction impurity, minimized overhydrolysis of the product amide by selection of a solvent that would be sacrificially hydrolyzed, eliminated genotoxic impurities, and improved the intrinsic safety of the process by eliminating the use of hydrogen peroxide. The process was demonstrated in duplicate on a 90 kg scale, with 89% isolated yield and greater than 99.8% purity.

REFERENCES

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References

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4539082/

http://www.ncbi.nlm.nih.gov/pubmed/26057634

https://clinicaltrials.gov/ct2/show/NCT0242334

Bhattachar, Shobha N.; Journal of Pharmaceutical Sciences 2011, 100(11), 4756-4765 

Investigational new drugs (2015), 33(2), 357-70.

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