Patent · US Expired

Reductive coupling of nitrobenzene or nitrobenzenes substituted on the nucleus to give the corresponding azobenzenes and azoxybenzenes by means of redox catalysts

US5917023A · kind A · utility

0Cited by

7References

10Claims

0Family size

Assignee

BASF SE

Inventors

Alfred Hagemeyer · Sunnyvale, US
Daniel Heineke · Ludwigshafen, DE
Guido Voit · Freinsheim, DE
Tom Witzel · Ludwigshafen, DE

Key dates

Filing date	Jun 5, 1997
Grant date	Jun 29, 1999
Priority date	—
Expiry date	Jun 5, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C291/08
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Nitrobenzene or a nitrobenzene substituted on the nucleus is subjected to reductive coupling to give the corresponding azobenzene and azoxybenzene under heterogeneous catalysis with substantial avoidance of overreduction to aniline derivatives by means of a redox catalyst in its reduced or partly reduced form, the redox catalyst containing at least one active metal component capable of a change of oxidation state.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.