Unusual transformation of 4-hydroxy/methoxybenzylic alcohols via C C ipso-substitution reaction using proton-exchanged montmorillonite as media
作者:Xuan Chen、Yangfang Yun、Zezhong Dong、Yu Zhou、Fei Li、Nan Jiang、Dongyin Chen
DOI:10.1016/j.tetlet.2020.152584
日期:2020.11
We present here proton-exchanged montmorillonite-mediated an unusual transformation of 4-hydroxy and 4-methoxybenzylic alcohols to form symmetrical benzylic ethers and diarylmethanes under mild conditions. Nuclear magnetic resonance spectroscopy and density functional theory calculations support a plausible mechanism, which includes a distinctive aromatic C-C ipso-substitution reaction with a hydroxymethyl group as the C-based leaving group. (C) 2020 Elsevier Ltd. All rights reserved.