反应详情

A mixture of ethyl 4,4,4-trifluoro-2-(triphenylphosphoranylidene)acetoacetate (270 g, 617 mmol) and potassium carbonate (54 g, 490 mmol) is heated from 160° C. to 225° C. in 3 h at 2-3 mbar vacuum. The title compound is distilled and recovered in a cold trap to yield the title compound (85 g, 83%) as a slightly yellow oil. ES/MS m/e 167 (M+1).

1. temperatureis heated from 160° C. to 225° C. in 3 h at 2-3 mbar vacuum
2. distillationThe title compound is distilled
3. customrecovered in a cold trap