Catalytic osmylation of electron poor allylic alcohols and ethers.
作者:Anna Bernardi、Silvia Cardani、Carlo Scolastico、Roberto Villa.
DOI:10.1016/s0040-4020(01)85840-3
日期:1988.1
The catalytic osmylation of electron-poor allylic ethers and alcohols was studied. In the case of γ-alkoxy E-enoates reaction selectivity was found to range from 2:1 to 8:1 in favor of the arabino (2,3-syn - 3,4-anti) product, regardless of the double bond substitution. Lower (if any) selectivity was found for the Z-isomers. On the contrary, 2-Mthylene-3-hydroxy esters were osmylated with virtually
研究了贫电子烯丙基醚和醇的催化渗透作用。在γ-烷氧基E-烯酸酯的情况下,发现反应选择性在2:1至8:1的范围内,有利于阿拉伯糖(2,3-syn-3,4-anti)产物,无论双键取代如何。发现Z异构体的选择性较低(如果有的话)。相反,2-甲亚甲基-3-羟基酯几乎完全被2,3-syn选择性地进行了甲磺酰化反应。讨论了影响反应的立体化学结果的因素