A Highly Enantioselective Zirconium Catalyst for Intramolecular Alkene Hydroamination: Significant Isotope Effects on Rate and Stereoselectivity
作者:Kuntal Manna、Songchen Xu、Aaron D. Sadow
DOI:10.1002/anie.201006163
日期:2011.2.18
Zirconium catalysts sparkle: A new chiral zirconium complex has been used to catalyze hydroamination reactions to cyclize aminopentenes into 2‐methylpyrrolidines (see scheme). The rate law supports a mechanism involving a reversible substrate–catalyst interaction that precedes the rate‐determining step. A new mechanism for zirconium‐catalyzed hydroamination has been proposed based on kinetic isotope
锆催化剂闪闪发光:一种新的手性锆配合物已用于催化加氢胺化反应,从而将氨基戊烯环化成2-甲基吡咯烷(见方案)。速率定律支持一种在速率确定步骤之前涉及可逆的底物-催化剂相互作用的机制。基于动力学同位素效应和同位素取代对对映选择性的显着影响,提出了一种锆催化加氢胺化的新机理。