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.
[EN] METAL COMPLEX OR ADDUCT THEREOF, CATALYST COMPRISING METAL COMPLEX OR ADDUCT THEREOF AND METHOD FOR PRODUCING SAME, LIQUID COMPOSITION OR ELECTRODE CONTAINING CATALYST, AND AIR BATTERY OR FUEL CELL EQUIPPED WITH ELECTRODE<br/>[FR] COMPLEXE MÉTALLIQUE OU PRODUIT D'ADDITION DE CELUI-CI, CATALYSEUR COMPRENANT UN COMPLEXE MÉTALLIQUE OU SON PRODUIT D'ADDITION ET PROCÉDÉ DE PRODUCTION CORRESPONDANT, COMPOSITION LIQUIDE OU ÉLECTRODE CONTENANT UN CATALYSEUR, ET BATTERIE À AIR OU PILE À COMBUSTIBLE ÉQUIPÉE D'UNE ÉLECTRODE<br/>[JA] 金属錯体又はその付加体、金属錯体又はその付加体を含む触媒及びその製造方法、触媒を含む液状組成物又は電極、電極を備える空気電池又は燃料電池
provided a series of catalysts based on a pyrazine heterocyclic scaffold with easy synthesis and further modification, diverse photoredox characteristics and wide application potential across modern photoredox transformations. The photoredox catalytic activities of the target catalysts were examined in a benchmark cross-dehydrogenative coupling and novel and challenging annulation reactions.
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.