Selective arylation at the vinylic site of cyclic olefins
作者:Xiaojin Wu、Jianrong (Steve) Zhou
DOI:10.1039/c3cc41722k
日期:——
Cyclicolefins usually give Heck products having an aryl ring residing at the allylic or homoallylic position. We describe herein a new method that allows arylation at the vinylic position of various cyclicolefins.
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