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
Room temperature nickel(0)/tricyclohexylphosphine [Ni(0)/PCy3]-catalyzed Suzuki–Miyaura cross-couplings of 4-(p-toluenesulfonyloxy)coumarins and 4-(p-toluenesulfonyloxy)-2(5H)-furanone with arylboronic acids 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
室温镍(0)/三环己基膦[Ni(0)/ PCy 3 ]催化的4-(对甲苯磺酰氧基)香豆素和4-(对甲苯磺酰氧基)-2(5H)-呋喃酮的Suzuki-Miyaura交叉偶联在该通信中描述了芳基硼酸。我们的研究表明,在Suzuki-Miyaura交叉偶联中,活化的烯基甲苯磺酸盐比芳基甲苯磺酸盐具有更高的活性。Ni(0)/ PCy 3催化剂的温和反应条件和高效率使其在合成两个重要生物学分子家族的4-取代的香豆素和4-取代的2(5H)-呋喃酮中非常有用。