Patent · US Expired

Preparation of bis-2-pyridyl-disulfides

US4256892A · kind A · utility

0Cited by

2References

8Claims

0Family size

Assignee

Rutgerswerke Aktiengesellschaft · DE

Inventors

Manfred Maurer · Tauberbischofsheim, DE
Winfried Orth
Werner Fickert · Mannheim, DE

Key dates

Filing date	Nov 8, 1979
Grant date	Mar 17, 1981
Priority date	—
Expiry date	Nov 8, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D213/71
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

In a process for the preparation of bis-2-pyridyl-disulfide or bis-(2-pyridyl-1-oxide)-disulfide optionally substituted on the pyridyl ring with at least one substituent selected from the group consisting of halogen and alkyl and alkoxy of 1 to 4 carbon atoms by oxidation of the corresponding 2-mercapto-pyridine or its N-oxide, the improvement comprising effecting the oxidation in an aqueous acid media containing an alkali metal or alkaline earth metal chlorite.

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