反应详情

To a solution of tert-butyl 3-(4-(3,4-difluoro-2-(trifluoro-methyl)phenyl) piperidine-1-carbonyl)-4,5-dihydro-1H-pyrazolo[3,4-c]pyridine-6(7H)-carboxylate (33, 41.2 g, 80.0 mmol) in CH2Cl2 (150 mL) was added TFA (70 mL). The mixture stirred at ambient temperature for 16 h and was then concentrated under reduced pressure to give ((4-(3,4-difluoro-2-(trifluoromethyl)phenyl)piperidin-1-yl)(4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridin-3-yl)methanone TFA salt (34) as an off-white solid (40.0 g, >99%). The material was used as is without spectral characterization.

1. concentrationwas then concentrated under reduced pressure