Novel and potent Lewis acid catalyst: Br<sub>2</sub>-catalyzed Friedel–Crafts reactions of naphthols with aldehydes
作者:Deqiang Liang、Jingjing Li、Yanni Li、Baoling Wang、Ping Cheng、Sha Luo
DOI:10.1080/00397911.2016.1139723
日期:2016.2.16
ABSTRACT A discovery that the inexpensive Br2 can serve as a potent Lewis acidcatalyst for bis(2-hydroxy-1-naphthyl)methanes synthesis is presented. Under the catalysis of Br2 at room temperature, naphthols reacted smoothly with various aldehydes with high efficiency and broad substrate scope. This reaction used to require highly acidic conditions and/or high temperature and/or pressure, and sometimes featured