Nickel-catalyzed Heck reaction of cycloalkenes using aryl sulfonates and pivalates
作者:Jianrong Steve Zhou、Xiaolei Huang、Shenghan Teng、Yonggui Robin Chi
DOI:10.1039/d1cc00634g
日期:——
Nickel-catalyzed Heck reaction of cycloalkenes delivers unusual conjugated arylated isomers. Nickel(0) catalysts ligated by chelating dialkylphosphines effectively activate not only aryl triflates as electrophiles, but also less reactive aryl mesylates, tosylates and pivalates. The omission of bases allows nickel hydride species to exist long enough to perform in situ olefin isomerization of initial
镍催化的环烯烃的Heck反应可产生不同寻常的共轭芳基化异构体。通过螯合二烷基膦连接的镍(0)催化剂不仅可以有效活化作为亲电子试剂的芳基三氟甲磺酸酯,而且还可以活化较少的芳基甲磺酸酯,甲苯磺酸酯和新戊酸酯。省略碱可使氢化镍物质存在足够长的时间,以进行初始Heck加合物的烯烃原位异构化。