Ethyl propiolate → HCID 57426482, compound

Participants

Reaction Steps

7.5 g (0.039 mole) of 6-chloro-3-diazooxindole is suspended in 400 ml of xylene and 8.4 g (0.086 mole) of ethyl propiolate added. The reaction mixture is heated 7 hours in a 160° silicone oil bath under nitrogen. A brown solid forms on cooling to room temperature (9.0 g, 59% yield). Recrystallization from dichloromethanemethanol gives 8.5 g of analytically pure title compound, m.p. 215°-217°.

Provenance & Evidence