反应详情

Hydrogenolysis is effected by dissolving 1.2 gm (4.2 mmol) of methyl 4-benzyloxy-3-carbamoylbenzoate in 60 mL of methanol (warmed to effect solution), adding 1 gm of 10% Pd/C (50% water) catalyst, and stirring under 48 psi of hydrogen overnight at room temperature. The reaction mixture is filtered, and the catalyst is repeatedly washed with 10% MeOH/DCM. The combined filtrates are evaporated to dryness to give 0.79 gm (4.05 mmol, 96% yield) of methyl 3-carbamoyl-4-hydroxybenzoate.

1. filtrationThe reaction mixture is filtered
2. washthe catalyst is repeatedly washed with 10% MeOH/DCM
3. customThe combined filtrates are evaporated to dryness