Synthesis 2018; 50(24): 4867-4874
DOI: 10.1055/s-0037-1610243
paper
© Georg Thieme Verlag Stuttgart · New York

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

Vitor S. C. de Andrade
,
Marcio C. S. de Mattos*
Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, CP 68545, Rio de Janeiro 219745-970, Brazil   Email: mmattos@iq.ufrj.br
› Author Affiliations
Further Information

Publication History

Received: 19 June 2018

Accepted after revision: 20 July 2018

Publication Date:
15 August 2018 (online)


Dedicated to Prof. W. Bruce Kover on the occasion of his 80th anniversary

Abstract

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 α-monohalogenation of β-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.

Supporting Information