E-viri
Recenzirano
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Qiu, Xiaodong; Li, Yangyang; Zhou, Li; Chen, Peishan; Li, Fan; Zhang, Yanan; Ling, Yong
Organic letters, 08/2020, Letnik: 22, Številka: 16Journal Article
A 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.
