A new class of asymmetric phase-transfer catalysts derived from Cinchona alkaloids — Application in the enantioselective synthesis of α-amino acids
作者:Barry Lygo、Philip G. Wainwright
DOI:10.1016/s0040-4039(97)10293-3
日期:1997.12
new class of Cinchona alkaloid-derived quaternary ammonium phase-transfer catalysts bearing a N-anthracenylmethyl function are presented. These catalysts show high stereocontrol in the asymmetric alkylation of a benzophenone-derived glycine-imine, and application of this process to the enantioselective synthesis of a range of α-amino acid esters (e.e. 67–94%) is investigated.
提出了一种新型的金鸡纳生物碱衍生的具有N-蒽基甲基官能团的季铵相转移催化剂。这些催化剂在衍生自二苯甲酮的甘氨酸-亚胺的不对称烷基化反应中显示出高度的立体控制,并且研究了该方法在一系列α-氨基酸酯(ee 67–94%)的对映选择性合成中的应用。