反应详情

To a solution of 0.50 g of 4-diethoxyphosphinylmethyl-N-(4-chlorophenyl)benzamide in 10 ml of dry THF was added in portions 0.07 g of sodium hydride (60%, in oil) under ice-cooling with stirring. After stirring for 30 minutes under ice cooling, a solution of 0.23 g of benzyl bromide in 2 ml of dry THF was added. After stirring for 5 hours at room temperature, 30 ml of water was added to the reaction mixture, and the mixture was extracted with chloroform. The extract was dried over anhydrous sodium sulfate, and the solvent was evaporated. The residue was subjected to silica gel column chromatography (eluent; chloroform:ethyl acetate=1:1) to give 4-diethoxyphosphinylmethyl-N-benzyl-N-(4-chlorophenyl)benzamide. It was recrystallized from benzene-n-hexane to give 0.40 g of colorless columnar crystals.

1. temperaturecooling
2. stirringAfter stirring for 30 minutes under ice cooling
3. stirringAfter stirring for 5 hours at room temperature
4. extractionthe mixture was extracted with chloroform
5. dry with materialThe extract was dried over anhydrous sodium sulfate
6. customthe solvent was evaporated