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-Methylcaprolactam as a Dipolar Aprotic Solvent for Iron-Catalyzed Cross-Coupling Reactions: Matching Efficiency with Safer Reaction Media
作者:Elwira Bisz、Pamela Podchorodecka、Michal Szostak
DOI:10.1002/cctc.201802032
日期:2019.2.20
to the more conventional palladium and nickel in the cross‐coupling arena, the major limitation is the necessity for carcinogenic N‐methylpyrrolidone as a co‐solvent in the vast majority of catalytic reactions. Herein, we introduce N‐methylcaprolactam as an efficient, non‐toxic and practical dipolar aprotic solvent for iron‐catalyzed C(sp2)−C(sp3) alkylative cross‐coupling of aryl chlorides and tosylates
尽管在交叉偶联领域,铁催化提供了更常规的钯和镍的强大替代品,但主要的局限性是在大多数催化反应中必须使用致癌的N-甲基吡咯烷酮作为助溶剂。在此,我们介绍N-甲基己内酰胺作为一种有效,无毒且实用的偶极非质子溶剂,用于铁催化芳基氯和甲苯磺酸酯的C(sp 2)-C(sp 3)烷基化交叉偶联。该方法的实用性体现在其广泛的底物范围,高收率和能够交叉偶联易被b-氢化物消除和均偶联的具有挑战性的烷基有机金属的能力。考虑到铁催化交叉偶联的广泛用途,我们设想N-甲基己内酰胺将广泛用作致癌性NMP的替代品。