Copper(II) Acetate/1,4-Diphenyl-1,4-diazabuta-1,3-diene Catalyzed Sonogashira Cross-Coupling of Aryl Halides with Terminal Alkynes under Aerobic and Solvent-Free Conditions
作者:Jin-Heng Li、Chen-Liang Deng、Ye-Xiang Xie、Du-Lin Yin
DOI:10.1055/s-2006-950207
日期:2006.10
The Sonogashira cross-coupling of aryl halides with terminal alkynes catalyzed by an inexpensive copper(II) acetate/1,4-diphenyl-1,4-diazabuta-1,3-diene [Cu(OAC) 2 /DAB-Ph] catalytic system is reported. A series of ligands, including diazabutadiene systems, N,N-dimethylglycine, L-proline, ethylenediamine, and phosphines, were evaluated, and 1,4-diphenyl-l,4-diazabuta-1,3-diene provided the best results
廉价的乙酸铜 (II)/1,4-diphenyl-1,4-diazabuta-1,3-diene [Cu(OAC) 2 /DAB-Ph] 催化芳基卤化物与末端炔烃的 Sonogashira 交叉偶联系统报告。对包括二氮杂丁二烯系统、N,N-二甲基甘氨酸、L-脯氨酸、乙二胺和膦在内的一系列配体进行了评估,其中 1,4-二苯基-l,4-二氮杂丁二烯-1,3-二烯提供了最佳结果。在乙酸铜 (II) (10 mol%)、l,4-diphenyl-l,4-diazabuta-1,3-diene (20 mol%) 和四丁基氟化铵 (3 equiv) 存在下,许多芳基用炔烃平稳处理碘化物或溴化物,以中等至优异的产率提供相应的产物。值得注意的是,该反应是在有氧和无溶剂条件下进行的。