反应详情

tert-Butyl{1-[2-(6,7-difluoro-2-oxoquinoxalin-1(2H)-yl)ethyl]piperidin-4-yl}carbamate (Intermediate 151, 500 mg, 1.23 mmol) was reacted with trifluoroacetic acid in dichloromethane as described for Intermediate 140 to give 380 mg (quantitative) of the crude product as an oil.