反应详情

To a solution of 10.02 g of methyl 2-chloro-5-nitrobenzoate dissolved in 100 ml of N,N-dimethylformamide, was added 23.92 g of a 15% aqueous solution of sodium methylmercaptan dropwise under ice cooling. The mixture was stirred for 30 minutes. Water was added to the reaction mixture and the whole was extracted with ethyl acetate. The organic layer was washed with saturated brine, and was dried over anhydrous magnesium sulfate. The crude product obtained by removal of the solvent under reduced pressure was recrystallized from ethyl acetate—hexane, to yield 8.76 g of methyl 2-methylthio-5-nitrobenzoate (melting point: 126.5-127.5° C.) (Reaction Scheme (42) described below).

1. extractionthe whole was extracted with ethyl acetate
2. washThe organic layer was washed with saturated brine
3. dry with materialwas dried over anhydrous magnesium sulfate
4. customThe crude product obtained by removal of the solvent under reduced pressure
5. customwas recrystallized from ethyl acetate—hexane