反应详情

A solution of methyllithium in diethyl ether (40 mL, 44 mmol) was diluted with tetrahydrofuran (120 mL), and a solution of 2-(4′-bromobiphenyl-4-yl)-N-methoxy-N-methylacetamide (12 g, 37 mmol) in tetrahydrofuran (50 mL) was added at −78° C., followed by stirring at the same temperature for 30 minutes. Water was added to the reaction solution, followed by extraction with ethyl acetate, and subsequently the solvent was distilled off under reduced pressure. The resulting residue was purified by chromatography on a silica gel column (Moritex Corporation, elution solvent: hexane/ethyl acetate), and a fraction corresponding to the Rf value=0.50 (hexane/ethyl acetate=4/1) by thin layer chromatography was concentrated under reduced pressure to afford the title compound (7.6 g, 26 mmol) as a white solid (yield 71%).

1. extractionfollowed by extraction with ethyl acetate
2. distillationsubsequently the solvent was distilled off under reduced pressure
3. customThe resulting residue was purified by chromatography on a silica gel column (Moritex Corporation, elution solvent: hexane/ethyl acetate)
4. concentrationa fraction corresponding to the Rf value=0.50 (hexane/ethyl acetate=4/1) by thin layer chromatography was concentrated under reduced pressure