Process for the preparation of amino-fluoro-s-triazine dyes by reaction of cyanuric fluoride with an amino dye and an amide in one operation
US4614818A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1983 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Jan 18, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B62/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of dyes of the formula ##STR1## in which D is a dye radical and R.sub.1 and R.sub.2 independently of one another is hydrogen or C.sub.1-4 -alkyl, which comprises reacting cyanuric fluoride of the formula ##STR2## simultaneously with a dye of the formula ##STR3## and with an ammonium salt of an amine of the formula EQU H.sub.2 N--R.sub.2 (4) in a neutral to alkaline medium, to give dyes of the formula (1) as single compounds in good yields in one operation. The novel process has the advantage of being able to be carried out as a "one-pot process" in a closed reaction vessel so that the apparatus is simple and immission by cyanuric fluoride is excluded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.