Chiral<i>N</i>(H)-<i>t</i>Bu and<i>N</i>(H)-Ad Ni<sup>II</sup>Complexes of Glycine Schiff Bases: Deduction of a Mode of Kinetic Diastereoselectivity
作者:Miguel A. Maestro、Fernando Avecilla、Alexander E. Sorochinsky、Trevor K. Ellis、José Luis Aceña、Vadim A. Soloshonok
DOI:10.1002/ejoc.201402145
日期:2014.7
The results reported herein have led to the discovery of a novel mode of kinetic diastereoselectivity in the alkylation of N-tert-butyl- and N-(1-adamanyl)-containing NiII complexes of glycine Schiff bases. It arises from a significant difference in the steric shielding between the N-H and N-tBu/Ad sides of the NiII coordination plane, directing the incoming electrophile towards the former.
本文报道的结果导致在含有 N-叔丁基和 N-(1-金刚烷基) 的甘氨酸席夫碱 NiIII 络合物的烷基化中发现了一种新的动力学非对映选择性模式。它源于 NiII 配位面的 NH 和 N-tBu/Ad 侧之间空间屏蔽的显着差异,将进入的亲电子试剂导向前者。