Iron-Catalyzed Cross-Coupling Reactions of Arylmagnesium Reagents with Aryl Chlorides and Tosylates: Influence of Ligand Structural Parameters and Identification of a General N-Heterocyclic Carbene Ligand
作者:Wenqin Wu、Qiaoqiao Teng、Yi-Yuan Chua、Han Vinh Huynh、Hung A. Duong
DOI:10.1021/acs.organomet.7b00180
日期:2017.6.26
evaluation of N-heterocyclic carbene ligands in the iron-catalyzed cross-coupling reactions of aryl chlorides and arylmagnesium reagents is performed. There is no clear correlation between the donor strength of the N-heterocyclic carbene and the reaction outcome. Instead, the highest yields of the desired biaryl product are obtained with sterically demanding ligands possessing large %Vbur values. Through
对芳基氯化物与芳基镁试剂的铁催化的交叉偶联反应中的N-杂环卡宾配体进行了系统的评估。N-杂环卡宾的供体强度与反应结果之间没有明确的相关性。取而代之的是,具有高%V bur值的对空间要求高的配体获得了期望的联芳基产物的最高产率。通过这项研究,SIPrNap已被确定为芳基氯化物和甲苯磺酸盐偶联的有效且通用的配体。