Process for the preparation of 2,6-diaminopyridine-azo dyestuffs

Details Process for the preparation of 2,6-diaminopyridine-azo dyestuffs Process for the preparation of 2,6-diaminopyridine-azo dyestuffs

1980-04-02

1982-04-20

Rotman, Alan L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

546287, 546289, 546294, 546307, 546345, C09B 2942, C07D21374

Patent

active

043258700

ABSTRACT:
An improved process for producing 2,6-diaminopyridines and azo dyestuffs therefrom involves reacting a 2,6-dihalopyridine with a primary amine in a two-phase system of water and an insoluble or sparingly soluble inert organic solvent in the presence of an inorganic base.

REFERENCES:
patent: 2742478 (1956-04-01), Bavley et al.
patent: 3980659 (1976-09-01), Fleckenstein et al.
patent: 4225716 (1980-09-01), Buhler et al.

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