Synthesis 2007(19): 3037-3043  
DOI: 10.1055/s-2007-983887
PAPER
© Georg Thieme Verlag Stuttgart · New York

A New Route to 6-Substituted Pyrrolo[2,1-b]thiazoles from Morita-Baylis-Hillman Adducts of Thiazole-2-carboxaldehyde

Young Seok Song, Kee-Jung Lee*
Organic Synthesis Laboratory, Department of Chemical Engineering, Hanyang University, Seoul 133-791, South Korea
Fax: +82(2)22984101; e-Mail: leekj@hanyang.ac.kr;
Further Information

Publication History

Received 14 May 2007
Publication Date:
11 September 2007 (online)

Abstract

A simple synthesis of pyrrolo[2,1-b]thiazoles from the thermal cyclization reaction of several Morita-Baylis-Hillman ace­tates of thiazole-2-carboxaldehyde has been described.

15

The MBH acetate of 1-methyl-1H-imidazole-2-carbox­-aldehyde was too unstable to be isolated. Also, the decom­-position products were obtained in refluxing Ph2O.

17

The stereochemistry of 9 was determined on the basis of 1H NMR data compared with values in ref. 12.