抄録
2-Substituted thiazokines (IIa-d) were prepared from 2-thiothiazokidone. IIa-d were converted to 2-(ethoxycarbonylcyanomethylene) thiazolidine (III) and its N-acetate and N-methyl derivative. Thiolester analogs of III were obtained by the reaction of IIa-d and cyanoacetic acid in acetic anhydride.