Structure-Based Analysis and Optimization of a Highly Enantioselective Catalyst for the Strecker Reaction
作者:Petr Vachal、Eric N. Jacobsen
DOI:10.1021/ja027246j
日期:2002.8.1
asymmetric Strecker reaction catalyzed by a metal-free Schiff base catalyst was conducted. The active site of the catalyst, the relevant stereoisomer of the imine substrate, and the solution structure of the imine-catalyst complex were elucidated using a series of kinetics, structure-activity, and NMR experiments. An unusual bridging interaction between the imine and the urea hydrogens of the catalyst was
进行了由无金属 Schiff 碱催化剂催化的不对称 Strecker 反应的机理研究。使用一系列动力学、结构-活性和核磁共振实验阐明了催化剂的活性位点、亚胺底物的相关立体异构体以及亚胺-催化剂复合物的溶液结构。亚胺和催化剂的尿素氢之间不寻常的桥连相互作用被确定并通过计算得到支持。基于机理洞察的催化剂结构的合理优化导致了不对称 Strecker 反应的改进催化剂。