Aryliminodimagnesium Reagents. XVI. Formation of<i>o</i>-Hydroxyazoarenes by Condensation with<i>o</i>-Hydroxynitroarenes. Favorable Role of<i>o</i>-Hydroxyl Group in the Reaction
作者:Masao Okubo、Takanori Nakashima、Haruko Shiku
DOI:10.1246/bcsj.62.1621
日期:1989.5
Hydroxy(HO)-azoxy- and -azoarenes were formed by condensation of ArN(MgBr)2 with o-, m-, and p-HO-nitrobenzenes; nuclear substitution took place as a minor or a major pathway. o-HO-azobenzene was obtained in sufficiently high yield. Relative yields of the products varied according to the position of HO group and reaction conditions. The yield variation was explained by the effects of relative efficiency