Enantioselective Friedel−Crafts Alkylation Reactions Catalyzed by a Chiral Nonracemic <i>C</i><sub>2</sub>-Symmetric 2,2‘-Bipyridyl Copper(II) Complex
作者:Michael P. A. Lyle、Neil D. Draper、Peter D. Wilson
DOI:10.1021/ol050075d
日期:2005.3.1
Enantioselective Friedel-Crafts alkylation reactions of a series of substituted indoles with methyl trifluoropyruvate, catalyzed by a chiral nonracemic C(2)-symmetric 2,2'-bipyridyl copper(II) triflate complex, are described. The corresponding 3,3,3-trifluoro-2-hydroxy-2-indole-3-yl-propionic acid methyl esters were formed in good yield and in high enantiomeric excess (up to 90%). This is the first
描述了由手性非外消旋C(2)-对称2,2'-联吡啶基三氟甲磺酸铜络合物催化的一系列取代的吲哚与三氟丙酮酸甲酯的对映选择性Friedel-Crafts烷基化反应。形成的3,3,3-三氟-2-羟基-2-羟基-2-吲哚-3-基-丙酸甲酯以高收率和高对映体过量(最高达90%)形成。这是手性非外消旋2,2'-联吡啶基配体在催化和对映选择性Friedel-Crafts烷基化反应中的使用的首次报道。还提出了通过X射线晶体学对手性2,2'-联吡啶配体的氯化铜(II)配合物的结构表征。[反应:看文字]