反应详情

A solution of 48 g (0.30 mole) of 3-diazooxindole and 38.7 g (0.39 mol) of ethyl propiolate in 2 l. of benzene is refluxed overnight. The reaction mixture is cooled to room temperature and the crude product filtered, wt.=60 g. Crystallization from absolute ethanol gives 54 g, m.p. 242°-244° (Sl. d.).

1. filtrationthe crude product filtered
2. customCrystallization from absolute ethanol
3. customgives 54 g, m.p. 242°-244° (Sl. d.)