Room Temperature Nickel(0)-Catalyzed Suzuki-Miyaura Cross-Couplings of Activated Alkenyl Tosylates: Efficient Synthesis of 4-Substituted Coumarins and 4-Substituted 2(<i>5H</i>)- Furanones
作者:Zhen-Yu Tang、Qiao-Sheng Hu
DOI:10.1002/adsc.200404150
日期:2004.12
Roomtemperaturenickel(0)/tricyclohexylphosphine [Ni(0)/PCy3]-catalyzed Suzuki–Miyaura cross-couplings of 4-(p-toluenesulfonyloxy)coumarins and 4-(p-toluenesulfonyloxy)-2(5H)-furanone with arylboronicacids are described in this communcation. Our study shows that activated alkenyl tosylates possess higher activities than aryl tosylates in the Suzuki–Miyaura cross-couplings. The mild reaction conditions