反应详情

A methanol (50 ml) solution of 2-chloro-3-nitropyridine (4.30 g, 27.1 mmol) was added dropwise to a methanol (30 ml) solution of sodium thiomethoxide (2.10 g, 28.5 mmol) while being cooled with ice, and the mixed solution was stirred for 17 hours. Water was then added to the reaction mixture, and the resulting mixture was extracted with ethyl acetate. The organic layer was washed with a saturated aqueous solution of sodium chloride, and dried over sodium sulfate. Subsequently, the solvent was distilled off, and the resulting crystals were recrystallized from a mixture of an ethyl acetate-hexane mixture to obtain 2.93 g (yield 64%) of 2-methylthio-3-nitropyridine as a yellow needle crystal.

1. temperaturewhile being cooled with ice
2. extractionthe resulting mixture was extracted with ethyl acetate
3. washThe organic layer was washed with a saturated aqueous solution of sodium chloride
4. dry with materialdried over sodium sulfate
5. distillationSubsequently, the solvent was distilled off
6. customthe resulting crystals were recrystallized from a mixture of an ethyl acetate-hexane mixture