Synthesis of Enantiopure Axially Chiral <i>C</i><sub>3</sub>-Symmetric Tripodal Ligands and Their Application as Catalysts in the Asymmetric Addition of Dialkylzinc to Aldehydes
作者:Gerhard Bringmann、Robert-Michael Pfeifer、Christian Rummey、Kristina Hartner、Matthias Breuning
DOI:10.1021/jo034697t
日期:2003.9.1
The enantioselective synthesis of a novel-type C(3)-symmetric tripodal ligand that is composed of a central mesitylene-derived core and three functionalized, axially chiral biaryl subunits is described. The triol (M,M,M)-3 is a suitable catalyst for the enantioselective addition of dialkylzinc to various aromatic aldehydes with asymmetric inductions of up to 98% ee.
描述了对映体选择性的新型C(3)对称三脚架配体的组成,该配体由中央均三甲苯基衍生的核心和三个功能化的轴向手性联芳基亚基组成。三醇(M,M,M)-3是用于将二烷基锌对映选择性加成到各种芳香醛中的合适催化剂,不对称诱导率最高为98%ee。