A novel efficient synthesis of heteroaryl substituted alpha,beta-unsaturated trifluoromethyl ketonesстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A synthesis of a novel electrophilic reagent 1,1,1-trifluoro-4-(phenylsulfonyl)-but-3-ene-2,2-diol 2 is described. The reaction of 2 with various electron-rich heteroaromatics such as furans, pyrroles, indoles is investigated. The addition-elimination reaction proceeds under mild conditions stereospecifically and permits a novel one-step procedure for the preparation of trifluoroacetylvinyl substituted heterocycles in high yield. In all cases only E-isomers of unsaturated CF3 ketones were obtained.