FIELD: chemistry.
SUBSTANCE: method comprises reacting phthalocyanines with excess phosphorus trichloride or tribromide in the presence of aluminium chloride or bromide, respectively, at temperature of 80-120°C, followed by treatment of the reaction mass with ice, oxidation and further hydrolysis of the separated product.
EFFECT: disclosed is a novel method which enables to obtain novel phthalocyanine mono- and diphosphonic acids with satisfactory output.
2 cl, 4 ex
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