Evaluation of Catalyst Acidity and Substrate Electronic Effects in a Hydrogen Bond-Catalyzed Enantioselective Reaction
作者:Katrina H. Jensen、Matthew S. Sigman
DOI:10.1021/jo1013806
日期:2010.11.5
A modular catalyst structure was applied to evaluate the effects of catalyst acidity in a hydrogen bond-catalyzed hetero Diels−Alder reaction. Linear free energy relationships between catalyst acidity and both rate and enantioselectivity were observed, where greater catalyst acidity leads to increased activity and enantioselectivity. A relationship between reactant electronic nature and rate was also
应用了模块化催化剂结构来评估催化剂酸度在氢键催化的杂Diels-Alder反应中的影响。观察到催化剂酸度与速率和对映选择性之间的线性自由能关系,其中更大的催化剂酸度导致活性和对映选择性增加。还观察到反应物电子性质与速率之间的关系,尽管与对映选择性没有这种相关性,这表明系统处于催化剂控制之下。