N-Acyl-o-phenylenediamines

Details N-Acyl-o-phenylenediamines N-Acyl-o-phenylenediamines

1981-08-14

1984-06-19

Raymond, Richard

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544140, 544152, 544153, 548374, 549458, 549487, C07D30754, C07D30786, C07D30792, C07D40504

Patent

active

044554362

ABSTRACT:
The invention relates to N-acyl-o-phenylenediamines of the formula ##STR1## wherein A is a colorless carbocyclic or heterocyclic aromatic radical and each of R.sub.1 and R.sub.2 independently is an alkyl, alkenyl or phenyl radical which is unsubstituted or substituted by non-chromophoric groups, but only one of R.sub.1 and R.sub.2 can be phenyl, and the ring B can also be substituted by non-chromophoric groups. The invention also relates to processes for the manufacture of these compounds, their use for whitening man-made organic material their conversion into benzimidazolium compounds as well as stable, concentrated aqueous solutions of such compounds, processes for their manufacture and their use for whitening manmade organic material.

REFERENCES:
patent: 3637734 (1972-01-01), Harnisch et al.
patent: 3720682 (1973-03-01), Widdig et al.
patent: 3869503 (1975-03-01), Widdig et al.
patent: 3940417 (1976-02-01), Schlaepfer
patent: 4018789 (1977-04-01), Littlewood et al.
patent: 4146725 (1979-03-01), Meyer et al.

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