Metal-Free Oxidative Annulation of 2-Naphthols with Terminal Alkynes Affording 2-Arylnaphtho[2,1<i>-b</i>]furans
作者:Long Liu、Xuyu Ji、Jianyu Dong、Yongbo Zhou、Shuang-Feng Yin
DOI:10.1021/acs.orglett.6b01352
日期:2016.7.1
For the first time, the selective oxidative transformation of 2-naphthols with terminal alkynes is disclosed, which enables the straightforward synthesis of 2-arylnaphtho[2,1-b]furans in satisfactory yields under metal-free conditions. Mechanistic study suggests that the reaction proceeds via free-radical-mediated sp2-C–H bond activation, C–C coupling, and C–O cyclization.
首次公开了2-萘酚与末端炔烃的选择性氧化转化,其使得在无金属条件下以令人满意的产率直接合成2-芳基萘[2,1- b ]呋喃成为可能。机理研究表明,该反应通过自由基介导的sp 2 -C–H键激活,CC偶联和CO环化来进行。