NH.sub.4.sup.+ Or group IA metal 2,7-dimethyl-1,2,3-tetrahydro-.beta.-hydroxy-1-quinolinepropanesulfonate s
US4499272A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1982 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Aug 20, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/3643
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Hydroxy-3-halo-1-propanesulfonates are reacted with certain arylamines, preferably in the presence of a base such as KOH or NaOH in one or more of ethylene glycol, propylene glycol, 2-ethoxyethanol and the like to give 2-hydroxy-3-(arylamino)-1-propanesulfonates useful as couplers for acid dyes for polyamide fibers. The present coupler products which are derivatives of aniline, tetrahydroquinoline, and benzomorpholine, have the general formulae ##STR1## wherein the rings may be substituted with a wide variety of substituents known to the dye art; PA1 M is NH.sub.4.sup.+ or a group IA metal, preferably Na.sup.+, or K.sup.+ ; and PA1 R.sup.3 is hydrogen or a group such as alkyl, cycloalkyl and aryl, each of which may be substituted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.