摘要:
A synthesis of a novel electrophilic reagent-beta-trifluoroacetylketene diphenyldithioacetal S,S-tetroxide 3 is described. The reaction of 3 with various electron-rich aromatics such as 1,3-dimethoxybenzene, 2-methylthiophene, N-methylpyrrole, and 2-methylindole was investigated. In the course of these reactions an unusual migration of a phenylsulfonyl group takes place. An easy and ready for scale-up procedure for the synthesis of previously unknown beta-aryl, alpha-phenylsulphonyl substituted alpha,beta-unsaturated trifluoromethyl ketones is reported. (C) 2003 Elsevier Ltd. All rights reserved.