反应详情

To a solution comprising 39.5 g of sodium sulfide nonahydrate and 110 ml of water, a solution comprising 32.9 g of methyl 3-amino-2-methyl-6-thiocyanobenzoate and 300 ml of ethanol, was dropwise added. The mixture was stirred at room temperature for 1.5 hours, and then 24 g of methyl iodide was dropwise added thereto under cooling with ice. The mixture was stirred at room temperature for 2 hours and then, concentrated under reduced pressure. A saturated sodium chloride aqueous solution was added thereto, and the mixture was extracted with chloroform. The chloroform layer was dried over anhydrous sodium sulfate, and then the solvent was distilled off to obtain 30.1 g of the desired product. Oily substance.

1. additionwas dropwise added
2. temperatureunder cooling with ice
3. stirringThe mixture was stirred at room temperature for 2 hours
4. concentrationconcentrated under reduced pressure
5. additionA saturated sodium chloride aqueous solution was added
6. extractionthe mixture was extracted with chloroform
7. dry with materialThe chloroform layer was dried over anhydrous sodium sulfate
8. distillationthe solvent was distilled off