Nickel-Catalyzed Etherification of Phenols and Aryl Halides through Visible-Light-Induced Energy Transfer
作者:Da-Liang Zhu、Shan Jiang、Qi Wu、Hao Wang、Hai-Yan Li、Hong-Xi Li
DOI:10.1021/acs.orglett.1c03066
日期:2021.11.5
arylhalides, the ability of such a Ni-catalyzed transformation employing phenols to diaryl ethers is unsuccessful due to phenolates with much lower reduction potentials, which suppress the oxidation of nickel(II) intermediates into requisite Ni(III) species. We herein report visible-light-initiated, nickel-catalyzed O-arylation of phenols with arylhalides using t-BuNH(i-Pr) as the base and thioxanthen-9-one
尽管在链烷醇和芳基卤化物的镍催化醚化方面取得了一些进展,但由于苯酚盐的还原电位低得多,从而抑制了镍 (II) 中间体氧化成必需的化合物,因此这种使用苯酚的镍催化转化为二芳基醚的能力并不成功Ni(III) 物种。我们在此报告了在可见光下使用t- BuNH( i- Pr) 作为碱和thioxanthen -9-one 作为光敏剂的可见光引发的镍催化苯酚与芳基卤化物的O-芳基化。这种光电耦合表现出广泛的基板范围。