 |
| LETTER | Synlett 2007: 1695-1698
DOI: 10.1055/s-2007-982565 |
© Georg Thieme Verlag Stuttgart · New York
|
 |
Conversion of Azobenzenes into N,N′-Diarylhydrazines by Sodium Dithionite
|
| Leiv K. Sydnes*a, Shire Elmia, Per Heggena, Bjarte Holmelida, Didrik Malthe-Sørensenb |
a Department of Chemistry, University of Bergen, Allégt. 41, 5007 Bergen, Norway
Fax: +4755589490; e-Mail: leiv.sydnes@kj.uib.no;
b GE Healthcare, Lindesnes Fabrikker, 4510 Spangereid, Norway
|
|
Received
7 March 2007 |
Abstract
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. Key words
azobenzenes - sodium dithionite - reduction - hydrazines
| |
