反应详情

Methyl 3-oxo-3,4-dihydro-2H-1,4-benzoxazine-6-carboxylate (Intermediate 86) (330 mg, 1.59 mmol) was deprotonated with sodium hydride and alkylated with 2-{4-[(tert-butoxycarbonyl)amino]piperidin-1-yl}ethyl methanesulfonate (Intermediate 6) (5.6 mmol) as described for Intermediate 2. Chromatography on silica gel with dichloromethane/methanol (20:1) gave the product in 85% yield as a yellow solid.