(E)-N'-(3-cyano-6-isopropylpyridin-2-yl)-N,N-dimethylformimidamide → {4-[4-(5-Bromo-pyridin-2-ylcarbamoyl)-2-(7-isopropyl-pyrido[2,3-d]pyrimidin-4-ylamino)-phenylsulfanyl]-phenyl}-carbamic acid 9H-fluoren-9-ylmethyl ester

Participants

Reaction Conditions

Reaction Steps

A mixture of the product from Example 17D (23.9 g, 37.4 mmol) and N′-(3-cyano-6-isopropyl-pyridin-2-yl)-N,N-dimethyl-formamidine (9.71 g, 44.9 mmol, 1.2 eq) in 450 mL of glacial acetic acid was heated in an oil bath at 150° C. for 2 h and then cooled to room temperature. The reaction mixture was evaporated in vacuo and the residue was dissolved in approximately 70 mL of dichloromethane. This material was purified by silica gel chromatography using a Biotage Flash 75M cartridge, eluting first with 1:4 ethyl acetate/dichloromethane followed by 98:2 dichloromethane/methanol. The resulting product triturated with dichloromethane and filtered to provide the title compound as a white solid (17.6 g, 58%).

Provenance & Evidence