Regioselective Substitution of Phenols with Trifluoroacetaldehyde Ethyl Hemiacetal
作者:Yuefa Gong、Katsuya Kato、Hiroshi Kimoto
DOI:10.1246/bcsj.74.377
日期:2001.2
Phenol did not react directly with trifluoroacetaldehyde ethyl hemiacetal. In the presence of catalytic amounts of anhydrous potassium carbonate, however, the reaction readily occurred. The p-substituted product 4-(2,2,2-trifluoro-1-hydroxyethyl)phenol predominated. In contrast, the reaction catalyzed by zinc halide predominantly produced the o-substituted product. Corresponding reactions of several