Novel Enantiocomplementary<i>C</i><sub>2</sub>‐Symmetric Chiral Bis(imidazoline) Ligands: Highly Enantioselective Friedel–Crafts Alkylation of Indoles with Ethyl 3,3,3‐Trifluoropyruvate
作者:Shuichi Nakamura、Kengo Hyodo、Yuko Nakamura、Norio Shibata、Takeshi Toru
DOI:10.1002/adsc.200800189
日期:2008.7.7
Enantioselective Friedel–Crafts alkylations of a variety of indoles with ethyl 3,3,3-trifluoropyruvate catalyzed by novel chiral m-phenylenebis(imidazoline)-copper(II) complexes or the bis(imidazoline)-achiral acid combination afforded products with high enantioselectivity. Both enantiomers of indole derivatives can be prepared with high enantioselectivities by tuning the N-substituents of the imidazoline
的各种吲哚的对映选择性的Friedel-Crafts烷基化反应与由新型手性催化乙基3,3,3-三氟丙酮米-phenylenebis(咪唑啉) -铜(II)配合物或双(咪唑啉)-achiral酸组合得到的产品具有高对映选择性。吲哚衍生物的两种对映异构体可以通过调节咪唑啉的N-取代基而以高对映选择性制备。