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Enantioselective Friedel−Crafts Reaction of β-Trifluoromethylated Acrylates with Pyrroles and Its Application to the Synthesis of Trifluorinated Heliotridane

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journal contribution
posted on 05.03.2010, 00:00 authored by Yiyong Huang, Etsuko Tokunaga, Satoru Suzuki, Motoo Shiro, Norio Shibata
The first chiral Lewis acid catalyzed enantioselective Friedel−Crafts alkylation of pyrroles with β-CF3 acrylates has been investigated, which afforded various types of chiral trifluoromethylated compounds in excellent yields (90−99%) with high ee’s (up to 99% ee). With the aid of the Friedel−Crafts reaction adduct, optically active trifluorinated heliotridane was successfully constructed.