The Wallach Rearrangement of Some 4,4′-Disubstituted Azoxybenzenes
作者:Ichiro Shimao、Shigeru Oae
DOI:10.1246/bcsj.56.643
日期:1983.2
treatment of azoxybenzenes bearing electron-withdrawing substituents at 4,4′-positions with sulfuric acid gave the corresponding 2-hydroxyazobenzenes, together with 4′-substituted 4-hydroxyazobenzenes. The treatment of 4,4′-dimethoxyazoxybenzene with p-toluenesulfonic acid and acetic anhydride afforded 4,4′-dimethoxy-3-acetoxyazobenzene and 4,4′-dimethoxy-2-tosyloxyazobenzene as the main rearrangement products