72114-13-7Relevant academic research and scientific papers
Preparation of octa(alkoxy) azaphthalocyanines
Morkved, Eva H.,Ossletten, Hege,Kjosen, Helge
, p. 1117 - 1121 (2007/10/03)
5,6-Bis(alkoxy)pyrazine-2,3-dicarbonitriles 3, with methoxy-, ethoxy-and propoxy-substituents, were allowed to react with magnesium alkoxides to form the corresponding magnesium octa(alkoxy)azaphthalocyanines 5a,d,e. Compound 5a was converted into the metal-free azaphthalocyanine 5b, and to the copper complex 5c. The propoxy substituted magnesium azaphthalocyanine 5e was converted to the metal free azaphthalocyanine 5f. Both 5e and 5f are readily soluble in organic solvents. The stable intermediate methyl 2,3-di(methoxy)-6-cyanopyrazine-5-carboximidate 4, was obtained both from a reaction of 5,6-dichloropyrazine-2,3-dicarbonitrile 1, with sodium methoxide in methanol, and in a sodium methoxide catalyzed reaction of 3a with ammonia in methanol. Compound 4 was converted into 5a with magnesium methoxide, and is therefore an intermediate between 3a and 5a.
