US 5,206,426 A · Phenylene diamines and process for the preparation of phenylene diamines

Abstract

Phenylene diamines of the formula ##STR1## in which R.sup.1 denotes hydrogen, formyl or oxalyl, R.sup.2 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl and R.sup.3 denotes hydrogen or C.sub.2 -C.sub.8 -alkanoyl, provided that R.sup.1 and R.sup.2 are not both hydrogen and that when R.sup.2 is methyl or ethyl, R.sup.1 and R.sup.3 are not both hydrogen, and a process for the preparation of phenylene diamines.

Claims1

Dependent claims

A phenylene diamine of formula I ##STR5## in which R.sup.1 denotes formyl or oxalyl,

R.sup.2 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl and
R.sup.3 denotes C.sub.2 -C.sub.4 -alkanoyl.

Dependencies are inferred from the claim text.

Facts

Application

07/815,159Filed 31 Dec 1991 · division

Priority

DE 39146503 May 1989

Granted

27 Apr 1993

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

C07C 309/46
Containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton: having the sulfo groups bound to carbon atoms…
C07C 309/51
Containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton: at least one of the nitrogen atoms being part…
C07C
Acyclic or carbocyclic compounds

Phenylene diamines and process for the preparation of phenylene diamines

Life of this patent

Abstract

Claims1

Phenylene diamines and process for the preparation of phenylene diamines

Life of this patent

Abstract

Claims1