Iron(III) Chloride Promoted Desulfitative C-C Coupling Reaction of alpha-Oxo Ketene Dithioacetals and Indoles: Highly Selective Synthesis of beta,beta-Bisindolyl and beta-Indolyl alpha,beta-Unsaturated Carbonyl Compounds

[摘要]：The iron(III) chloride promoted desulfitative C-C coupling of alpha-oxo ketene dithioacetals with indoles was developed for the synthesis of indole derivatives. In the presence of iron(III) chloride, alpha-oxo ketene dithioacetals reacted efficiently and highly selectively with C2-unsubstituted or C2-substituted indoles to afford excellent yields of beta,beta-bisindolyl or beta-indolyl alpha,beta-unsaturated carbonyl compounds, respectively.

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