Tetrapyrrolic photosensitizers and imaging agent compounds having A, B, C, and D rings and having a reduced B ring and an oxidized D ring. The compounds preferably have a purity of at least 95 percent and preferably have a fused system connected at an unsaturated carbon atom of the C ring nearest the D ring and at the unsaturated carbon atom between the C and D rings. The invention also includes a method of making the compounds at over 95 percent yield by starting with a B and D ring oxidized tetrapyrollic compound and dissolving it in a halogenated hydrocarbon solvent and treating it with sufficient nitroalkane solution of FeCl36H2O to oxidize the D ring and separating the resulting organic layer and drying.
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吡咯类光敏剂和成像剂化合物具有A、B、C和D环,并具有还原的B环和氧化的D环。这些化合物最好具有至少95%的纯度,并且最好具有在C环最靠近D环的不饱和碳原子和C和D环之间的不饱和碳原子处连接的融合系统。该发明还包括一种制备该化合物的方法,该方法通过使用B和D环氧化的四
吡咯化合物作为起始物,在卤代烃溶剂中溶解并用足够的FeCl36H2O的硝基烷溶液处理以氧化D环,并分离所得有机层并干燥,可以获得95%以上的收率。