Process for preparing phenyl- and naphthylazo-aminonaphthol sulp

Details Process for preparing phenyl- and naphthylazo-aminonaphthol sulp Process for preparing phenyl- and naphthylazo-aminonaphthol sulp

1985-02-11

1989-06-20

Higel, Floyd D.

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

Organic compounds

Azo

534591, 534841, 534842, 534581, 534582, 534887, 534617, 534642, 534638, 534635, 534637, C09B 4100, C09B 41136, C09B 62028, C09B 6251

Patent

active

048410276

ABSTRACT:
Improvement in a process for producing an arylazo-aminonaphtholsulfonic acid represented by a free acid of the formula, ##STR1## wherein A is a phenyl or naphthyl group unsubstituted or substituted by one to four members selected from alkyl, alkoxy, phenoxy, sulfonic acid, carboxylic acid, arylamino, amino, nitro and hydroxyl groups and halogen atoms, and m is 0 or 1, which comprises reacting an aminonaphtholsulfonic acid represented by a free acid of the formula, ##STR2## wherein m is as defined above, with a dibasic acid anhydride to obtain an acylaminonaphtholsulfonic acid, coupling a diazonium compound of amine of the formula,

REFERENCES:
patent: 2384750 (1945-09-01), Knight et al.
patent: 2656346 (1953-10-01), Knecht et al.
patent: 2849436 (1953-08-01), Buehler
patent: 2938896 (1960-05-01), Strobel et al.
patent: 2973351 (1961-02-01), De Montmollin et al.
patent: 3649615 (1972-03-01), Ikeda et al.
Fibre-Reactive Dyes; W. F. Beech, 1970.

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