Title of article
N-Bromosuccinimide assisted oxidation of 5-aminopyrazoles: formation of bis diazenylderivatives
Author/Authors
Salaheldin، نويسنده , , Abdellatif M. and Oliveira-Campos، نويسنده , , Ana M.F. and Rodrigues، نويسنده , , Lيgia M. and Nkeonye، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2007
Pages
4
From page
8819
To page
8822
Abstract
Treatment of 5-amino-4-cyanopyrazoles with N-bromosuccinimide, in DMF at rt gave azo dyes resulting from dimerization through the amino groups and further oxidation.With bromine water the dimer was also formed but, bromination occurred on the aryl ring, either at reflux or rt. Reduction of the azo group with zinc in acetic acid originated the corresponding pyrazoles.
Keywords
Bromination , Pyrazole , dimers , azo dyes , NBS
Journal title
Tetrahedron Letters
Serial Year
2007
Journal title
Tetrahedron Letters
Record number
1857508
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