Substituted benzopyran compounds
US4547579A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Oct 15, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There are described novel dyes of the formulae ##STR1## in which R.sub.1 and R.sub.2 independently of one another are each hydrogen, unsubstituted or substituted alkyl, cycloalkyl, aralkyl or aryl, and R.sub.1 and R.sub.2 together with the nitrogen atom, and optionally with the inclusion of further hetero atoms, can also form a 5- to 7-membered heterocycle, or one of the radicals R.sub.1 or R.sub.2 can be linked with the carbon atoms, in the o-position with respect to the amino group, of the ring A to form a fused-on, saturated, unsubstituted or substituted 5- or 6- membered ring, PA1 X is .dbd.NR.sub.3, .dbd.NCOR.sub.4, ##STR2## .dbd.NH or .dbd.O, wherein R.sub.3 is alkyl or unsubstituted or substituted phenyl, PA2 R.sub.4 is unsubstituted or substituted alkyl, aralkyl, aryl, vinyl, alkoxy, phenoxy or amino, and PA2 R.sub.5 is cyano, carbalkoxy, or unsubstituted or substituted carbonamide, and PA1 R.sub.6 is an electron-attracting radical, processes for producing them, and their use for dyeing and printing synthetic and semi-synthetic fibres, such as polyamide and cellulose triacetate materials, especially however polyester materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.