Efficient Guanidine-Catalyzed Alkylation of Indoles with Fluoromethyl Ketones in the presence of Water
作者:Marco Bandini、Riccardo Sinisi
DOI:10.1021/ol9005079
日期:2009.5.21
A simple and efficient guanidine-catalyzed methodology for the direct preparation of trifluoromethyl-indolyl-phenylethanols in the presence of water is reported. This synthetically viable class of compounds is obtained in excellent yields (up to 98%) through Friedel-Crafts-type alkylation of indoles with aromatic fluoromethyl ketones. Exceptional reaction scope of indoles and alkylating agents is described.
DBSA‐Catalyzed Regioselective Dehydrative Friedel‐Crafts Arylation of CF
<sub>3</sub>
‐Containing 3‐Indolyl(2‐thiophenyl)methanols with 2‐Substituted Indoles in Water
A green and efficient regioselectivedehydrativeFriedel‐Craftsarylation of trifluorinated 3‐indolyl(2‐thiophenyl) methanols with 2‐substitutedindoles, catalyzed by DBSA (dodecylbenzenesulfonic acid) in water is described. This simple and atom‐economical protocol features a unique regioselective 1,8‐addition, operational simplicity, mild conditions, excellent functional group compatibility, and environmental