Abstract
Abstract Convenient and efficient one-pot syntheses of 5-substituted-1,3,4-thiadiazol-2-ylcarbamoyl aliphatic amide acid derivatives were described and developed using sulfamic acid catalyst. Thiosemicarbazide and substituted triethylorthoester and cyclic/alicyclic anhydride were efficiently condensed using sulfamic acid to furnish 5-disubstituted-1,3,4-thiadiazol-2-ylcarbamoyl aliphatic acid and amide derivatives in fair to good yield, which exclusively get cyclized to new cyclic amide derivatives. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications® to view the free supplemental file.
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