Process for the manufacture of bis-azomethine metal complex...

Details Process for the manufacture of bis-azomethine metal complex... Process for the manufacture of bis-azomethine metal complex...

C - Chemistry, Metallurgy

09

B

260/236, 260/428

C09B 55/00 (2006.01)

Patent

CA 1052782

ABSTRACT OF THE DISCLOSURE Process for the manufacture of bis-azomethine metal complex colorants of the formula Image wherein A denotes an isocyclic or heterocyclic aromatic radical, X denotes an isocyclic or heterocyclic aromatic radical to which the N-atoms are bonded in the o-position or peri-position, or an alkylene radical containing 2 - 8 C atoms, and M denotes a divalent transi?ion metal ion, a zinc ion or cadmium ion, characterized in ?hat an o-hydroxy- aldimine compound of the formula Image wherein A has the abovementioned meaning and R denotes an alkyl, cycloalkyl or aryl radical, is reacted with a diamine of the formula NH2-X-NH2 wherein X has the abovementioned meaning, in the molar ratio of 2:1, in the presence of a compound which donates a divalent transition metal cation, zinc ion or cadmium ion.

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