Stereochemistry of nucleophilic reductions of 2-methyl-4-t-butylcyclohexanones. Further support for the linear combination of SSC and PSC stereochemical models
作者:Jim-Min Fang、Shih-Feng Sun、Min-Hon Rei
DOI:10.1039/p29890000747
日期:——
trimethoxyaluminium hydride and methyl-lithium with equal stereoselectivity of axial attack (i.e. 95 ± 1%). This is attributed to the equal steric strain control (SSC) of these three reagents in the absence of product stability control (PSC) brought about by the equal stability of its two secondary alcohol products (i.e. ΔG°= 0 and Δπ=aΔG°= 0).
反式-2-甲基-4-叔丁基环己酮与氢化铝锂,三甲氧基氢化铝锂和甲基锂反应,具有相等的轴向侵蚀立体选择性(即95±1%)。这归因于这三种试剂在不存在通过其两个仲醇的产品相等的稳定性(所带来的产品稳定性控制(PSC)的相等空间张力控制(SSC)即Δ。ģ °= 0和Δπ=一Δ ģ °= 0)。