A Simple and Efficient Synthesis of Some Novel Thiazolidine-4-one Derivatives

[摘要]：Reaction of 4-phenylthiosemicarbazide with dialkyl acetylenedicarboxylate in CH2Cl2 at 0 degrees C lead to construction of alkyl 3-amino-2-phenyliminothiazolidine-4-one-5-ylidene acetate in a few minutes and good yields. Alternatively, the use of thiosemicarbazide has given the corresponding 3-amino-2-iminothiazolidine-4-one-5-ylidene acetate, while application of di-t-butylacetylenedicarboxylate in these reactions has not entailed with cyclization.

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