反应详情

To a solution of N-cyanomethyl 2-bromomethylcyclohexanecarboxamide (3.0 g, 11.58 mmol) in acetone (100 mL) at room temperature were added, in two portions, cesium carbonate (5.77 g, 17.5 mmol) and the crude 3,4-difluorothiophenol (2.69 g, 18.4 mmol). After 16 h, ethyl acetate (100 mL) was added. The solution was washed with 1M HCl (40 mL), brine (20 mL), evaporated, and purified on a short plug of silica gel (30% ethyl acetate/hexane to elute non-polar impurities, then 20-30% ethyl acetate/dichloromethane to give N-cyanomethyl 2-(3,4-difluorophenylsulfanylmethyl)-cyclohexanecarboxamide.

1. washThe solution was washed with 1M HCl (40 mL), brine (20 mL)
2. customevaporated
3. custompurified on a short plug of silica gel (30% ethyl acetate/hexane
4. washto elute non-polar impurities