反应详情

A mixture of 4-[5-(1,3-dioxolan-2-yl)-4-methyl-2-thienyl]-butanamine (2.73 g) and methyl N-[2-(acetoxy)acetyl]-1-methyl-2-(phenylmethylene)-hydrazinecarboximidothioate (3.38 g) was heated to 60° for 2 h. Toluene (20 ml) and 5N hydrochloric acid (12 ml) were added and the mixture stirred at room temperature for 18 h. The mixture was basified to pH 8, washed with toluene, basified to pH 10 and extracted with ethyl acetate. The extract was evaporated to give an oil which was purified by column chromatography on silica using 3:1 ethyl acetate:methanol as eluent to give the title compound as a pale yellow solid (0.6 g) m.p. 118°-121° (softens).

1. temperaturewas heated to 60° for 2 h
2. washwashed with toluene
3. extractionextracted with ethyl acetate
4. customThe extract was evaporated
5. customto give an oil which
6. customwas purified by column chromatography on silica using 3:1 ethyl acetate