Highly stereoselective reduction of acyclic α-sulfinyl ketimines: synthesis of enantiomerically pure β-aminosulfoxides
作者:José L Garcı́a Ruano、Marta M Cifuentes、Antonio Lorente、Jesús H Rodrı́guez Ramos
DOI:10.1016/s0957-4166(99)00523-6
日期:1999.12
DIBAL reduction of enantiomerically pure α-sulfinyl ketimines can be achieved almost completely stereoselectively under ZnX2 catalysis, regardless of the alkyl or aryl substituent at nitrogen and the aliphatic (cyclic or acyclic) or aromatic character of the imine. Steric factors as well as the electrophilic character of the hydride are responsible for the stereochemical course of the reduction.
对映体纯的α-亚磺酰基酮亚胺的DIBAL还原可在ZnX 2催化下几乎完全立体选择性地实现,而与氮上的烷基或芳基取代基以及亚胺的脂族(环状或无环)或芳族特性无关。氢化物的立体因素以及亲电特性是还原反应的立体化学过程的原因。