Carbothioamide as Highly Efficient Ligand for Copper-catalyzed Room Temperature Chan-Lam Cross-Coupling Reaction
作者:Jayantajit Baruah、Kongkona Gogoi、Anindita Dewan、Geetika Borah、Utpal Bora
DOI:10.1002/bkcs.11248
日期:2017.10
The catalytic activity of three N,S‐donor ligands, viz L1 [2‐(4‐methoxybenzylidene)‐N‐phenylhydrazinecarbothioamide], L2 [2,2′‐(1,2‐diphenylethane‐1,2‐diylidene)bis(hydrazinecarbothioamide)] and L3 [2‐(4‐methoxybenzylidene)hydrazinecarbothioamide] has been reported for N‐arylation of imidazoles with arylboronic acids in ethanol at room temperature. The method was found to be applicable in N‐arylation
三个N,S-给体配体的催化活性,即L1 [2-(4-甲氧基亚苄基)-N-苯基肼甲硫代酰胺],L2 [2,2'-(1,2-二苯基乙烷-1,2-二亚甲基)bis(据报道,在室温下,L3 [2-(4-甲氧基亚苄基)肼基甲硫基酰胺]可用于在乙醇中将咪唑与芳基硼酸进行N-芳基化反应。发现该方法适用于N-芳基化反应,使各种电子形式的芳基硼酸与咪唑的分离收率均中等至优异。发现原位生成的配体铜(II)络合物2-(4-甲氧基亚苄基)-N-苯基肼基碳硫代酰胺(L1)是N-芳基化反应的高效均相催化剂。