反应详情

A mixture of methyl 4-benzyloxy-2-hydroxybenzoate (20 g) and concentrated aqueous ammonia (30 mL) in ethanol (100 mL) is heated on the steam bath in a sealed pressure vessel overnight. The contents of the pressure vessel are dissolved in methanol and the solution is evaporated to dryness. The residue is subjected to flash chromatography, eluting first with dichloromethane to remove unreacted starting material, and then with a mixture of ethyl acetate and dichloromethane (3:7 v/v), to obtain 2-hydroxy-4-benzyloxybenzamide (4 g), in the form of a white solid.

1. temperatureis heated on the steam bath in a sealed pressure vessel overnight
2. customthe solution is evaporated to dryness
3. washeluting first with dichloromethane
4. customto remove unreacted
5. additionwith a mixture of ethyl acetate and dichloromethane (3:7 v/v)