反应详情

1-Acetyl-3-trifluoromethyl-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester 27f (0.24 g, 0.72 mmol) was dissolved in a little ethyl acetate. A solution of 2.7 N hydrochloric acid in 5 mL of ethyl acetate was then added. The reaction mixture was reacted at room temperature and monitored by thin layer chromatography until the disappearance of the starting materials. The reaction mixture was concentrated under reduced pressure to obtain the title compound 1-(3-trifluoromethyl-5,6,7,8-tetrahydro-imidazo[1,5-a]pyrazin-1-yl)-ethanone 27g, which was directly used in the next step.

1. customThe reaction mixture was reacted at room temperature
2. concentrationThe reaction mixture was concentrated under reduced pressure