Mechanistic Studies of Pd-Catalyzed Regioselective Aryl CH Bond Functionalization with Strained Alkenes: Origin of Regioselectivity
作者:David I. Chai、Praew Thansandote、Mark Lautens
DOI:10.1002/chem.201100210
日期:2011.7.11
Mechanistic studies of a palladium‐catalyzed regioselective aryl CH functionalization of 2‐pyrrole phenyl iodide with norbornene are presented. Kinetic and spectroscopic analyses together with crystallographic data provide evidence for intermediates in a proposed stepwise mechanism. On the basis of the mechanistic studies, the origin of the regioselectivity is due to a ligand exchange between I− and
钯催化的区域选择性的芳基C的机理研究 H带降冰片烯-2-吡咯苯基碘官能被呈现。动力学和光谱分析以及晶体学数据为所提出的逐步机理中的中间体提供了证据。在机理研究的基础上,区域选择性的起源是由于我之间的配体交换-和HO -在降冰片基钯络合物上。这些机理研究还暗示,醇盐或水是造成Palladacycle形成的原因,但是Palladacycle与HX的可逆开环-闭环过程可能会延迟关键中间体的反应速率。拟议机制的重要方面进行了详细讨论。