Enantioselective synthesis of (3-indolyl)glycine derivatives via asymmetric Friedel–Crafts reaction between indoles and glyoxylate imines
作者:Qiang Kang、Zhuo-An Zhao、Shu-Li You
DOI:10.1016/j.tet.2008.12.061
日期:2009.2
Chiral phosphoric acid-catalyzed enantioselective Friedel–Crafts reaction of indoles with ethyl glyoxylate imines was developed. With 10 mol % of the catalyst, the Friedel–Crafts reactionsbetween a wide range of indoles and imines have been carried out, affording optically active (3-indolyl)glycine derivatives with excellent yields and high enantioselectivities (up to 87% ee).