ol0c02236_si_001.pdf (7.7 MB)
Nickel(II)-Catalyzed Borylation of Alkenyl Methyl Ethers via C–O Bond Cleavage
journal contribution
posted on 2020-07-31, 22:29 authored by Xiaodong Qiu, Yangyang Li, Li Zhou, Peishan Chen, Fan Li, Yanan Zhang, Yong LingA new protocol has
been developed for the borylation of conjugated
alkenyl methyl ethers using B2Pin2 via C–O
bond cleavage catalyzed by Ni(II). In this cross-coupling reaction,
both E/Z isomers of alkenyl ethers
are converted into (E)-alkenyl boronic esters with
good reactivity. This transformation exhibits high chemoselectivity
in the presence of competitive C–O bonds such as aryl ether,
ester, amide, and thioether groups, thus providing a new method for
the construction of various alkenyl boronates.