A Highly Enantioselective Hydrogenation of Silyl Enol Ethers Catalyzed by Chiral Frustrated Lewis Pairs
作者:Simin Wei、Haifeng Du
DOI:10.1021/ja507536n
日期:2014.9.3
Using a simple combination of tri-tert-butylphosphine and chiral borane generated in situ by the hydroboration of chiral diene with HB(C6F5)2 as a frustratedLewis pair catalyst, a highly enantioselective metal-freehydrogenation of silyl enol ethers was successfully realized to furnish a variety of optically active secondary alcohols in 93-99% yields with 88->99% ee's.
通过手性二烯与 HB(C6F5)2 的硼氢化反应原位生成的三叔丁基膦和手性硼烷的简单组合作为受挫的路易斯对催化剂,成功实现了甲硅烷基烯醇醚的高对映选择性无金属氢化以 93-99% 的收率提供各种光学活性仲醇,其中 ee 为 88->99%。
Direct oxidation of benzylic and allylic silyl ethers to carbonyl compounds
作者:Olivier Piva、Ai¨cha Amougay、Jean-Pierre Pete
DOI:10.1016/0040-4039(91)80608-9
日期:1991.8
Oxidation of benzylic or allylic silyl ethers with DDQ under UV irradiation leads directly to the corresponding carbonyl compounds with moderate to good yields.