Process for preparing azo dyestuffs containing 2,4,6-tri-amino-3

Details Process for preparing azo dyestuffs containing 2,4,6-tri-amino-3 Process for preparing azo dyestuffs containing 2,4,6-tri-amino-3

1974-08-12

1977-07-26

Wyman, Daniel E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260296R, C09B 2936, C07D21338

Patent

active

040382680

ABSTRACT:
Azo dyestuffs free of sulphonic acid groups and carboxylic acid groups are prepared by coupling a diazo compound with a coupler which is prepared by reacting an organic amine with a pyridinium salt having the formula ##STR1## IN WHICH R is substituted or unsubstituted alkyl, cycloalkyl, aralkyl or aryl; and

REFERENCES:
patent: 2068353 (1937-01-01), Schneiderwirth
patent: 2857372 (1958-10-01), Straley et al.
patent: 3080374 (1963-03-01), Carbon
patent: 3657214 (1972-04-01), Berrie et al.
patent: 3853896 (1974-12-01), Pessolano et al.
Cossey et al., "Angew. Chem. Internat. Edit", vol. 11, No. 12, pp. 1099 & 1100, (1972).

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