Nitrogen-containing aromatic heterocyclic compounds as anti-oxidants
US4042562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1975 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Oct 6, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/522
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention concerns novel nitrogen-containing aromatic heterocyclic compounds of the formula: ##STR1## wherein R is a group of the formula ##STR2## wherein R.sub.1 and R.sub.2 are substituents, e.g. alkyl and R.sub.3 is hydrogen or a substituent, e.g. alkyl; R.sub.4 is a group R.sub.14 --X--, wherein R.sub.14 is a substituent, e.g. alkyl and X is --O--, --S-- or ##STR3## wherein R.sub.6 is hydrogen or a substituent, e.g. alkyl, or R.sub.4 is a heterocyclic ring or has one of the significances of R; R.sub.5 has one of the significances of R.sub.4 ; and Y is --N.dbd. or --CH.dbd.. PA1 The compounds are useful as anti-oxidants in, e.g. plastics materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.