Rational Design of an Iron‐Based Catalyst for Suzuki–Miyaura Cross‐Couplings Involving Heteroaromatic Boronic Esters and Tertiary Alkyl Electrophiles
作者:Michael P. Crockett、Alexander S. Wong、Bo Li、Jeffery A. Byers
DOI:10.1002/anie.201914315
日期:2020.3.23
cross‐coupling reactions between a variety of alkyl halides and unactivated aryl boronic esters using a rationally designed iron‐based catalyst supported by β‐diketiminate ligands are described. High catalyst activity resulted in a broad substrate scope that included tertiary alkyl halides and heteroaromatic boronic esters. Mechanistic experiments revealed that the iron‐based catalyst benefited from the
描述了使用合理设计的β-二酮基配体支撑的铁基催化剂,各种烷基卤化物与未活化的芳基硼酸酯之间的Suzuki-Miyaura交叉偶联反应。较高的催化剂活性导致较宽的底物范围,其中包括叔烷基卤化物和杂芳族硼酸酯。机理实验表明,铁基催化剂得益于β-二酮基配体支持低配位和高还原性铁酰胺中间体的倾向,这对于实现铃木-宫浦交叉偶联反应所需的过渡金属步骤非常有效。