Isothiourea-Mediated One-Pot Synthesis of Trifluoromethyl Substituted 2-Pyrones
作者:Pei-Pei Yeh、David S. B. Daniels、David B. Cordes、Alexandra M. Z. Slawin、Andrew D. Smith
DOI:10.1021/ol403697h
日期:2014.2.7
A one-potisothiourea-mediated Michael addition/lactonization/thiol elimination cascade sequence for the formation of 4,6-disubstituted and 3,4,6-trisubstituted 2-pyrones from (phenylthio)acetic acids and α,β-unsaturated trifluoromethyl ketones is described. The synthesis of a COX-2 inhibitor and the wide-ranging derivatization of the 2-pyrone moiety to trifluoromethyl substituted aromatics and heteroaromatics