Boron-Catalyzed Regioselective Deoxygenation of Terminal 1,2-Diols to 2-Alkanols Enabled by the Strategic Formation of a Cyclic Siloxane Intermediate
作者:Nikolaos Drosos、Bill Morandi
DOI:10.1002/anie.201503172
日期:2015.7.20
The selective deoxygenation of polyols is a frontier in our ability to harness the stereochemical and structural complexity of natural and synthetic feedstocks. Herein, we describe a highly active and selective boron‐based catalytic system for the selective deoxygenation of terminal 1,2‐diols at the primary position, a process that is enabled by the transient formation of a cyclic siloxane. The method
多元醇的选择性脱氧是我们利用天然和合成原料的立体化学和结构复杂性的能力的前沿。本文中,我们描述了一种高活性和基于硼的选择性催化体系,用于在主要位置对末端1,2-二醇进行选择性脱氧,该过程可通过瞬态形成环状硅氧烷来实现。该方法为众所周知的催化不对称反应提供了理想的补充,以制备几乎完全对映异构体过量的具有挑战性的手性2-链烷醇,如抗炎药(R)-赖索茶碱的简短合成所示。