Syntheses and reactions of 2‐halo‐5‐thiazolecarboxylates
- 1 November 1985
- journal article
- research article
- Published by Wiley in Journal of Heterocyclic Chemistry
- Vol. 22 (6) , 1621-1630
- https://doi.org/10.1002/jhet.5570220631
Abstract
A variety of 2‐halo‐5‐thiazolecarboxylates was prepared from substituted‐3‐aminoacrylates and 3‐ketoes‐ters. Selective reduction of 2‐chloro‐5‐thiazolecarboxylates 4a, 4i and 4j with sodium borohydride in ethanol provided the corresponding 2‐halo‐5‐thiazolemethanols 27‐29. Nucleophilic displacements on [2‐chloro‐4‐(trifluoromethyl)‐5‐thiazolyl]methyl methanesulfonate (32c) occurred selectively at the 5‐substituent to provide 2‐chloro‐4‐(trifluoromethyl)‐5‐(heteroatom‐substituted‐methyl)thiazoles 32d‐f.Keywords
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