Conjugate Boration of β,β-Disubstituted Unsaturated Esters: Asymmetric Synthesis of Functionalized Chiral Tertiary Organoboronic Esters
作者:Xinhui Feng、Jaesook Yun
DOI:10.1002/chem.201002361
日期:2010.12.10
Challenging tertiary organoboronic esters containing a β‐ester group were prepared enantioselectively via the asymmetric conjugate boration of β,β‐disubstituted α,β‐unsaturated esters with a copper–phosphine catalyst (see scheme). The functionalized organoboron derivatives can be utilized as a carbon nucleophile to form all‐carbon quaternary centers.
具有挑战性的含β-酯基的叔有机硼酸酯是通过β-β-二取代的α,β-不饱和酯与铜-膦催化剂的不对称共轭硼酸对映选择性制备的(参见方案)。功能化的有机硼衍生物可用作碳亲核试剂,形成全碳四元中心。