Dimethyl acetylenedicarboxylate → HCID 12437416, compound

Participants

Reaction Steps

Dimethyl acetylenedicarboxylate (85.26 g, 0.6 mol) and 5-(p-nitrophenyl)-1,3,4-oxathiazol-2-one (33.63 g, 0.15 mol) were heated as given above for 15 hours. Crystallization of the brown solid from methanol (2×) gave little improvement in purity. The brown solid was decolorized in ethyl acetate solution and recrystallized (3×) to give 12.2 g (0.0378 mol, 25.2%) of dark gold solid, m.p. 142°-143°.

Provenance & Evidence