ortho-Difunctionalization of arynes by LiZnEt2(TMP)-mediated deprotonative zincation/elimination of aryl triflates
作者:Seoyoung Cho、Qiu Wang
DOI:10.1016/j.tet.2018.03.044
日期:2018.6
Generation of arynes from aryl triflates has been achieved using lithium diethyl(tetramethylpiperidyl)-zincate base LiZnEt2(TMP), via a directed ortho-deprotonative zincation and subsequent elimination of the triflate group. The aryne formation has been demonstrated by the cycloaddition reaction with diene and insertion reactions with ureas. Furthermore, the nucleophilicaddition of LiZnEt2(TMP) to
We developed a one-pot method for the generation of benzynes from a range of readily available 2-hydroxyphenylboronic acids. This method features the in situ activation of both boronic acid and hydroxyl groups of the substrate to enhance benzyne generation at 60 °C. Such mild conditions facilitate the generation of functionalized benzynes that immediately react with diverse arynophiles to produce multisubstituted