Aromatic heterocyclic hydrazide derivatives
US3957765A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Apr 1, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3492
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention concerns novel aromatic heterocyclic hydrazide derivatives of the formula: ##SPC1## Wherein A is a radical ##SPC2## Wherein R.sub.1 is tertiary alkyl and R.sub.2 and R.sub.3 are hydrogen or substituents, e.g. alkyl, R.sub.4 is a group -X-R.sub.14.sub.' wherein X is a bridging function, e.g. O, and R.sub.14 is a substituent, e.g. alkyl, a heterocyclic group --N Z wherein Z, with the nitrogen atom, forms a heterocyclic ring or a radical -NH-A, wherein A is as defined above, R.sub.5 has inter alia one of the significances of R.sub.4 and Y is -N= or -CH=, which are useful antioxidants, e.g. for stabilizing plastics material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.