A Room-Temperature Catalytic Asymmetric Synthesis of Allenes with ECNU-Phos
作者:Yuli Wang、Wanli Zhang、Shengming Ma
DOI:10.1021/ja406135t
日期:2013.8.7
asymmetrically established from racemic one-carbon central chirality efficiently at room temperature: we report here the discovery of the first catalytic asymmetric carbonylation of readily available racemic propargylic carbonates to access opticallyactive 2,3-allenoates with fairly high ee. The combination of [(π-allyl)PdCl]2 with [(R)-ECNU-Phos], a new chiral bisphosphine ligand based on a biphenyl skeleton