Abstract
The transformation of N-substituted 2-heteroylthiosemicarbazides to N-(2-substituted imino)-4-amino-5-cyanothiazol-3(2H)-3-yl)-heteroyl-2-carboxamides was achieved via the reaction with tetracyanoethylene, which is used as a building block in this transformation. The structures of the products have been confirmed unambiguously by single-crystal X-ray structure analysis. A rationale for the formation of the products is presented.
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Acknowledgements
Alaa A. Hassan is indebted to the AvH-Foundation for the donation of a Shimadzu 408 IR instrument. The authors also thank Egyptian Mission, Ministry of higher education, Egypt for its financial support to Mrs. Lamiaa E. Abd El-Haleem during her accommodation at the Karlsruhe Institute für Technology, Karlsruhe, Germany.
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Hassan, A.A., Aly, A.A., Mohamed, N.K. et al. Tetracyanoethylene as a building block in the facile synthesis of heteroyl-tetrasubstituted thiazoles. Monatsh Chem 151, 1425–1431 (2020). https://doi.org/10.1007/s00706-020-02669-4
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DOI: https://doi.org/10.1007/s00706-020-02669-4