2,6-Bis(2-alkylphenyl)-3,5-dimethylphenol as a New Chiral Phenol with <i>C</i><sub>2</sub>-Symmetry. Application to the Asymmetric Alkylation of Aldehydes
An Intriguing Effect of Polymer-Bound Lithium Amides in Catalytic Enantioselective Rearrangement of<i>meso</i>-Epoxides Mediated by Chiral Lithium Amides
作者:Masatoshi Asami、Atsushi Seki
DOI:10.1246/cl.2002.160
日期:2002.2
dialkylamides were prepared from the corresponding polymer-bound amines and butyllithium. The reagent was successfully employed as an in situ regenerating agent of a chiral lithium amide in a catalytic enantioselective rearrangement of meso-epoxides, and chiral allylic alcohols were obtained in up to 95% ee.
聚合物结合的二烷基酰胺锂由相应的聚合物结合的胺和丁基锂制备。该试剂成功地用作手性氨基锂的原位再生剂,用于催化内消旋环氧化物的对映选择性重排,并获得高达 95% ee 的手性烯丙醇。