Chemistry of pyrrolic compounds. XLVIII. The chemistry of porphyrins carrying sulfur-containing substituents at a <i>meso</i> -carbon

The preparation of a meso -thioacetoxyporphyrin by ring synthesis from a dipyrrylthione is described together with the reaction of thiocyanogen with octaethylporphyrin and coproporphyrin 11 to give meso -thiocyanatoporphyrins. Attempts to produce meso -mercaptoporphyrins by hydrolysis of either meso -thioacetoxy- or meso -thiocyanato-porphyrins failed. Instead the corresponding disulfides were produced and the properties of this latter group are described.