One-Pot Telescoped Synthesis of Thiazole Derivatives from β-Keto Esters and Thioureas Promoted by Tribromoisocyanuric Acid.

Autor: de Andrade, Vitor S. C., de Mattos, Marcio C. S.
Předmět:
Zdroj: Synthesis; 2018, Vol. 50 Issue 24, p4867-4874, 8p
Abstrakt: A simple and efficient one-pot protocol has been developed for the synthesis of thiazole derivatives from readily available starting materials. Tribromoisocyanuric acid was successfully used for a-monohalogenation of ß-keto esters in aqueous medium, which in the presence of thiourea and DABCO produced the corresponding 2-aminothiazoles in up to 87% yield. Extension of the reaction to thioacetamide and o-phenylenediamine led to 2-methylthiazole and quinoxalines, respectively. This approach enables telescoping of the two steps into a single process. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index