Enantioselective Friedel-Crafts reaction of indoles with trifluoroacetaldehyde catalyzed by Cinchona alkaloids
作者:Dmitry A. Borkin、Shainaz M. Landge、Béla Török
DOI:10.1002/chir.20982
日期:2011.9
trifluoro‐1‐(indol‐3‐yl)ethanols (TFIEs) is described by an enantioselective organocatalytic method from indoles and inexpensive trifluoroacetaldehyde methyl hemiacetal. The reaction is catalyzed by hydroquinine to produce TFIEs in an almost quantitative yield and with enantioselectivities up to 75% at room temperature. The enantioselectivity is strongly dependent on the concentration of substrates and