Water-insoluble azolystyryl optical brighteners
US4510311A · kind A · utility
15Cited by
9References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1983 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Jan 14, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65318
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to compounds of the formula ##STR1## or isomeric mixtures thereof, wherein A represents a quasiaromatic heterocyclic radical, PA0 B represents a radical of the formulae ##STR2## n represents 0, 1, 2 or 3, preferably 0-2, R.sub.1 represents hydrogen, CN, R or acyl, PA0 R.sub.2 represents hydrogen, halogen, --OR, --NHR, --N(R').sub.2 or NHCOR, PA0 R' represents alkyl and PA0 R represents R', alkenyl, aralkyl, cycloakyl or aryl. They are valuable optical brighteners and/or laser dyes and some of them are intermediate products for preparing these end products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.