Aromatic heterocyclic hydrazide derivatives

Details Aromatic heterocyclic hydrazide derivatives Aromatic heterocyclic hydrazide derivatives

1974-04-01

1976-05-18

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 458NT, 2602401, 260248CS, C07D25108, C07D40114, C07D41304, C07D41314

Patent

active

039577651

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.

REFERENCES:
patent: 3296188 (1967-01-01), Leu
patent: 3530127 (1970-09-01), Biland et al.
patent: 3629189 (1971-12-01), Minagawa et al.
patent: 3673152 (1972-06-01), Minagawa et al.
patent: 3706740 (1972-12-01), Dexter et al.
Chem. Abs., Vol. 74, 1971, 32847a, Article by Belyabov et al., "Stabilization of Cellulose Esters (Ethers)."

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