反应详情

To a solution of dimethylacetylene dicarboxylate (1.4 g, 9.9 mmol) in diethylether (40 mL) under argon was added a solution of hydrazine in THF (1 M, 10 mL) and the resulting mixture stirred at room temperature overnight. The precipitate was filtered off and dried to afford the title compound (597 mg, 35%) as a white solid. MS: m/e=175.2 [M+H]+.

1. filtrationThe precipitate was filtered off
2. customdried