Compounds of the general formula I ##STR1## where the symbols n independently of one another are each 0, 1 or 2, m is 0 or 1, A.sup..crclbar. is an anion, the radicals X independently of one another are each hydrogen, methyl or ethyl and the radicals R independently of one another are each hydrogen, unsubstituted or substituted alkyl, cycloalkyl or aryl, or two adjacent radicals R may furthermore be alkylene or, together with the carbon atoms to which they are bonded, may form an unsaturated or aromatic ring, with the proviso that one or more symbols n are not 0.
Azaporphyrin derivatives of the formula ##STR1## where R.sup.1 and R.sup.2 are each, independently of one another, hydrogen, unsubstituted or substituted C.sub.1 -C.sub.20 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl or unsubstituted or substituted phenyl, or two adjacent R.sup.1 radicals form, together with the carbon atoms to which they are bonded, an unsaturated or aromatic 5- to 7-membered carbocyclic ring, X are each hydrogen or C.sub.1 -C.sub.4 -alkyl and p are each 1 or 2, and biladienes of the formula ##STR2## where R.sup.1, R.sup.2, X and p each have the abovementioned meanings, m and n are each 0 or 1 and An.sup..crclbar. is an anion, as intermediates therefor, are used for preparing vinylogous porphyrin derivatives.
A group of novel expanded porphyrin-like compounds, porphacyanine (Pc) and porphacyanine-like compounds, having absorption maxima in the range of 400-850 nanometers is useful in detecting and treating targeted tissues, cells and viruses. The use of the Pc of the invention permits the irradiation to comprise wavelengths other than those absorbed by blood. The Pc of the invention may also be conjugated to target-specific moieties such as immunoglobulins or fragments thereof to target specific tissues or cells for the radiation treatment. Use of these materials permits greater depth of treatment penetration and greater specificity in targeting tissues or cells. Coupled with an appropriate paramagnetic ion or radioisotope, the Pc of the invention is suitable for use in nuclear magnetic resonance imaging and radioimaging.
A method for synthesizing a porphocyanine having the formula: ##STR1## where each R is ethyl, comprises either: (1) treating 3,3'-4,4'-tetraethyl-5,5'-bisaminomethyl-2,2'-dipyrromethane with a 10-fold excess of DDQ or (2) treating 3,3'-4,4'-tetraethyl-5,5'-diformyl 2,2'-dipyrromethane with ammonia, followed by column chromatography purification and evaporating to dryness the eluant containing the purified product.
An optical recording medium has a recording layer, a reflective layer and a protective layer, all of which are arranged on a substrate. The recording layer contains a porphyrin compound represented by the following formula (1): ##STR1## wherein R.sub.1 to R.sub.8 independently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkylcarbonyl group, an alkoxycarbonyl group, an alkylthio group or a halogen atom, R.sub.9 to R.sub.12 independently represent a hydrogen atom or an alkyl group, and X.sup.- represents an anion.
