Palladium-catalyzed benzylic-like nucleophilic substitution of benzofuran-, benzothiophene- and indole-based substrates by dimethyl malonate anion
作者:Gaëlle Primault、Jean-Yves Legros、Jean-Claude Fiaud
DOI:10.1016/s0022-328x(03)00728-9
日期:2003.12
The palladium-catalyzed benzylic-like nucleophilic substitution of acetates derived from benzofuran, benzothiophene and indole was investigated. The asymmetric substitution on racemic 1-(2-benzofuryl)ethyl acetate gave disappointing results, but the substitution product was obtained in 98% ee from (S)-1-(2-benzofuryl)ethyl acetate with overall retention of configuration.
研究了钯催化的衍生自苯并呋喃,苯并噻吩和吲哚的乙酸酯的苄基样亲核取代。外消旋的1-(2-苯并呋喃基)乙酸乙酯的不对称取代反应令人失望,但取代产物是由(S)-1-(2-苯并呋喃基)乙酸乙酯以98%ee的形式得到的,且保留了构型。