Conversion of Azobenzenes into <i>N</i>,<i>N</i>′-Diarylhydrazines by Sodium Dithionite
作者:Leiv Sydnes、Shire Elmi、Per Heggen、Bjarte Holmelid、Didrik Malthe-Sørensen
DOI:10.1055/s-2007-982565
日期:2007.7
A number of chloro-, methyl- and methoxy-substituted azobenzenes have been reduced to the corresponding hydrazines by using an aqueous solution of Na2S2O4. The yield is generally excellent, but two compounds, viz. 4,4-dimethoxyazobenzene and 2,2,4,4,6,6-hexamethylazobenzene, gave no hydrazine at all.
通过使用 Na2S2O4 水溶液,一些氯代、甲基和甲氧基取代的偶氮苯被还原成相应的肼。收率通常很高,但有两种化合物,即 4,4-二甲氧基偶氮苯和 2,2,4,4,6,6-六甲基偶氮苯,完全没有生成肼。