REGIOSELECTIVE FUNCTIONALIZATION OF cis-BICYCLO|3.3.0|OCTENONE DERIVATIVES. OXYMERCURATION/REDUCTION versus HYDROBORATION/OXIDATION. ACETAL GROUPS AS REGIO- AND STEREOSELECTIVE CONTROL ELEMENTS
作者:Elena Carceller、Assumpta Castelló、M. Lluísa García、Albert Moyano、Félix Serratosa
DOI:10.1246/cl.1984.775
日期:1984.5.5
Cyclic acetal groups at the position 8 of the cis-bicyclo|3.3.0|octane system may act as regio- and stereoselective control elements, respectively, in hydroboration and oxymercuration reactions. Whereas the regioselectivity observed in hydroborations must be ascribed to homoallylic inductive effects, and leads predominantly to exo, 1,3-bifunctional relationships, the effect of acetal group in oxymercuration
顺式-双环|3.3.0|辛烷体系第 8 位的环状缩醛基团可以分别作为区域选择性和立体选择性控制元素,用于硼氢化和氧汞化反应。虽然在硼氢化反应中观察到的区域选择性必须归因于同烯丙基诱导效应,并且主要导致外向、1,3-双功能关系,但氧汞化中缩醛基团的作用主要是立体选择性的,这是由于乙酸汞与非键电子对的配位。缩醛基团的内氧原子,主要导致外向,1,4-双功能关系。