反应详情

To a solution of methyl 3-amino-4-fluoro-2-methylbenzoate (3.00 g, 16.4 mmol) in hydrochloric acid (6 N, 54.6 mL) was added a solution of sodium nitrite (1.24 g, 18.0 mmol) in water (3 mL) at 0° C., and the mixture was stirred for 2 hr. To the reaction solution was added aqueous potassium acetate solution (30%) at 0° C. to adjust the reaction solution to pH 4, and a solution of 2-methylpropane-2-thiol (2.03 mL, 18.0 mmol) in ethanol (3 mL) was added. The reaction solution was stirred at room temperature for 12 hr, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate and the solvent was evaporated under reduced pressure to give methyl 3-[(tert-butylthio)diazenyl]-4-fluoro-2-methylbenzoate (2.90 g, yield 62%) as a crudely purified product.

1. stirringThe reaction solution was stirred at room temperature for 12 hr
2. extractionthe mixture was extracted with ethyl acetate
3. dry with materialThe extract was dried over anhydrous sodium sulfate
4. customthe solvent was evaporated under reduced pressure