Base-promoted new C–C bond formation: an expedient route for the preparation of thiazolo- and imidazolo-pyridinones via Michael addition
作者:Muhammet Yıldırım、Derya Çelikel、Naciye Evis、David W. Knight、Benson M. Kariuki
DOI:10.1016/j.tet.2014.06.070
日期:2014.9
Base-catalyzed one-pot cyclocondensation reactions of acryloyl and cinnamoyl chlorides with beta-nitroenamine derivatives have been performed under mild conditions and target 7-substituted thiazolo-[3,2-alpha] or imidazolo-[1,2-alpha]pyridin-5-one derivatives were prepared successfully in moderate to good yields. The cyclization reactions may proceed via Michael addition followed by iminoketene-amide tautomerization in view of the products formed. (C) 2014 Elsevier Ltd. All rights reserved.
TOKUMITSU, TAKAO, BULL. CHEM. SOC. JAP., 63,(1990) N, C. 1921-1924