| abstract |
Azaporphyrin derivatives of the formula <IMAGE> in which R¹ and R²: each hydrogen, optionally substituted C1-C20-alkyl, C5-C7-cycloalkyl or optionally substituted phenyl or two adjacent radicals R¹ together with the carbon atoms to which they are attached, an unsaturated one or aromatic 5- to 7-membered carbocyclic ring, X: in each case hydrogen or C1-C4-alkyl and; p: 1 or 2 each, biladienes of the formula <IMAGE> in which R¹, R², X and p each have the abovementioned meaning, m and n each 0 or 1 and An <⊖> are an anion, as their intermediates and their Use for the production of vinylogenic porphyrin derivatives. |