反应详情

1.6 g of boron trifluoride diethyl etherate was added to a mixture of 1.0 g of 3-amino-2-(methoxycarbonyl)methoxypyridine, 3 ml of 1,2-dimethoxyethane and 1 ml of dichloromethane dropwise at −10° C. The mixture was stirred for 10 minutes at the same temperature, then, to the reaction solution was added a solution of 0.68 g of t-butyl nitrite in 1 ml of 1,2-dimethoxyethane dropwise at −5° C. or lower. The mixture was stirred for 30 minutes at the same temperature, then, into the mixture was poured n-pentane. The lower layer of two separated layers was dissolved in 5 ml of acetic anhydride, and the mixture was stirred for 1 hour at 80° C. The solvent was distilled off, then, the resulted residue was subjected to silica gel chromatography to obtain 0.45 g of 3-acetoxy-2-(methoxycarbonyl)methoxypyridine.

1. stirringThe mixture was stirred for 30 minutes at the same temperature
2. stirringthe mixture was stirred for 1 hour at 80° C
3. distillationThe solvent was distilled off