Pure and substantially pure asymmetric 1:2 cobalt complexes of monoazo compounds
US4159983A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1978 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Jan 16, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/34
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Pure and substantially pure asymmetric 1:2 cobalt complexes of the formula, ##STR1## and mixtures of such complexes, in which X is hydrogen or nitro, either, R.sub.1 and R.sub.2, independently, are hydrogen, (C.sub.1-4)-alkyl, (C.sub.1-4)alkoxy, chlorine, bromine or nitro or R.sub.1 is hydrogen, chlorine or nitro, and R.sub.2 is -SO.sub.2 NR.sub.3 R.sub.4, in which R.sub.1 and R.sub.2 occupy the 4- and 5-positions, either R.sub.3 is hydrogen or unsubstituted or substituted (C.sub.1-4)alkyl, and R.sub.4 is hydrogen or unsubstituted or substituted (C.sub.1-4)alkyl, (C.sub.5-7)cycloalkyl or phenyl, or R.sub.3 and R.sub.4 or together with the nitrogen atom to which they are bound, form a non-aromatic 5- or 6- membered heterocyclic ring which contains one or two hetero atoms, PA1 B is a divalent radical of a coupling component of the 1- or 2-hydroxynaphthalene series which is coupled in the 2- or 1- position ortho to the hydroxy group and is bound to the cobalt atom through the oxygen atom, PA1 D is a divalent radical of a coupling component of the 2-naphthylamine series which is coupled in the 1- position ortho to the amino group or a divalent radical of the 5-aminopyrazole series whic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.