Process for the preparation of metallizable azo dyes by carrying

Details Process for the preparation of metallizable azo dyes by carrying Process for the preparation of metallizable azo dyes by carrying

1991-08-28

1993-03-23

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534581, 534582, 534602, 534780, 534841, 534842, 534843, C09B 4100, C09B 2902

Patent

active

051965186

ABSTRACT:
A process for the preparation of azo dyes of formula ##STR1## wherein K is the radical of a coupling component of the benzene or naphthalene series or of the heterocyclic series, and the hydroxy group is attached to K adjacent to the azo group, X is hydrogen or nitro and M is an alkali metal ion, which process comprises coupling a diazo component of formula ##STR2## in the presence of one or more buffer mixtures and in the absence or presence of an alkali metal chloride, to a coupling component of formula ##STR3## in which formulae (2) and (3) K and X are as defined for formula (1). The present invention makes it possible to prepare the azo dyes in high yields.

REFERENCES:
patent: 2589955 (1952-03-01), Neier et al.
patent: 2659720 (1953-11-01), Kuster
patent: 2812321 (1957-11-01), Eberhart et al.
patent: 3948879 (1976-04-01), Dore
patent: 4996303 (1991-02-01), Puntener et al.
patent: 5026830 (1991-06-01), Langfeld et al.
Fierz-David, H. "Fundamental Processes of Dye Chemistry"; Interscience Publishers, New York (1949) p. 251.
Franke et al., Chemical Abstracts, vol. 105, No. 228492j (1986).
Zollinger, H. "Azo and Diazo Chemistry", Interscience Publishers, New York (1961) p. 250.
Kamichi et al. Chemical Abstracts, vol. 106, No. 178104g (1987).
C. Synowietz and K. Schaffer, Chemiker Kalender, Springer Verlag (1984) pp. 534-538.

Affiliated with

Also associated with

Rating

Process for the preparation of metallizable azo dyes by carrying does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of metallizable azo dyes by carrying, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of metallizable azo dyes by carrying will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1352652