Benzoic anhydride → Benzoic Acid

Participants

Reaction Conditions

Reaction Steps

Benzoic anhydride (10.27 g) was added to a solution of 1-aminoisoquinolin-6-ol (3.312 g) in pyridine (53 ml) at ambient temperature. The mixture was heated at 125° C. for 1 h, the pyridine was removed under reduced pressure and excess pyridine was removed by azeotroping with toluene (X2). Water was added and the mixture extracted with dichloromethane (X3), dried (sodium sulphate) and concentrated in vacuo to give a solid precipitate. Recrystallisation with dichloromethane-diethyl ether gave benzoic acid 1-benzylaminoisoqinolin-6-yl ester (6 g), EIMS: m/z=369.1 [M+H]+.

Provenance & Evidence