Water soluble texaphyrin metal complex preparation
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The present invention is directed to methods for synthesizing water soluble hydroxy-substituted texaphyrins retaining lipophilicity. The synthesis comprises condensing a diformyltripyrrole with an ortho-phenylenediamine to give a nonaromatic texaphyrin having at least one hydroxy substituent, and oxidizing the condensation product to form an aromatic texaphyrin metal complex having at least one hydroxy substituent. These expanded porphyrin-like macrocycles may be used for magnetic resonance imaging and for photodynamic therapy in the treatment of atheroma and tumors.