Palladium-Catalyzed Cross-Coupling of Styrenes with Aryl Methyl Ketones in Ionic Liquids: Direct Access to Cyclopropanes
作者:Pietro Cotugno、Antonio Monopoli、Francesco Ciminale、Antonella Milella、Angelo Nacci
DOI:10.1002/anie.201408245
日期:2014.12.1
Cu(OAc)2, and dioxygen in molten tetrabutylammonium acetate (TBAA) promotes an unusual cyclopropanation reaction between aryl methyl ketones and styrenes. The process is a dehydrogenative cyclizing coupling that involves a twofold CH activation at the α‐position of the ketone. The substrate scope highlights the flexibility of the catalyst; a reaction mechanism is also proposed.
熔融乙酸四丁铵(TBAA)中Pd(OAc)2,Cu(OAc)2和双氧的组合使用会促进芳基甲基酮和苯乙烯之间异常的环丙烷化反应。该过程是脱氢环化偶联,涉及在酮的α-位上的两倍CH活化。底物范围突出了催化剂的灵活性。还提出了反应机理。