4-Bromobenzophenone → HCID 14072044, compound

Participants

Reaction Conditions

Reaction Steps

2.61 g (0.01 mole) of 4-bromobenzophenone and 1.13 ml of butyrolactam (0.015 mole) are fused together at 180° C., and 1.4 g of K2CO3 and 0.63 g of Cu powder are added. The mixture is stirred at this temperature for 2 h, allowed to cool to 140° C. and then dissolved in ethyl acetate. Chromatography on silica gel eluting with toluene/ethyl acetate provides N-(4-benzoylphenyl)-2-pyrrolidinone of melting point 162°-164° C., which is immediately dissolved in 10 ml of methanol and 10 ml of 5 N NaOH and boiled under reflux for about 2 h. After the methanol has been removed by distillation, the mixture is acidified to pH 5, and the product is filtered off with suction. Melting point: 156°-158° C.

Provenance & Evidence