反应详情

A mixture of tert-butyl 4-cyano-5-hydrazinothiophene-2-carboxylate (1.0 g, 4.2 mmol) and hydrochloric acid (0.7 mL of 37% solution) in methyl alcohol (15 mL) was stirred at room temperature for 14 hours. The reaction mixture was diluted with ethyl acetate (50 mL) and washed with an aqueous solution of sodium bicarbonate. Organic layer was separated, dried over anhydrous sodium sulfate, and evaporated to give 0.9 g of the title compound.

1. washwashed with an aqueous solution of sodium bicarbonate
2. customOrganic layer was separated
3. dry with materialdried over anhydrous sodium sulfate
4. customevaporated