Oligomeric cyclization of dinitriles in the synthesis of phthalocyanines and related compounds: the role of the alkoxide anion

摘要: The formation of phthalocyanine from phthalonitrile has been shown to proceed through reactive precursors condensing oligomeric intermediates which, as a result ring-closure reactions, cyclize conjugated macrocyclic product. roles alkoxide anion in the reaction scheme leading illustrated by isolation precursor sodium 1-imido-3-methoxyisoindolene and intermediate lithium 1-imido-3-(3-methoxy-5-nitroisoindolenin-1-ylideneamino)-5-nitroisoindole (6) while its role overall yield desired product comparing magnesium dibenzobarrelenoporphyrazine that obtained when concentration was reduced during synthesis.