反应详情

A solution of 2-chloro-2-methoxycarbonylthiophene-3(2H)-one (30 mmol) in acetic acid (20 ml) was saturated with dry hydrogen chloride gas. After standing for 3 days the solvent was removed under reduced pressure and the oily residue distilled to give a yellow liquid which crystallised on addition of aqueous acetic acid (m.p. 42°-44° C.).

1. customthe solvent was removed under reduced pressure
2. distillationthe oily residue distilled
3. customto give a yellow liquid which
4. customcrystallised on addition of aqueous acetic acid (m.p. 42°-44° C.)