SYNTHESIS OF PORPHYRINS WITH FOUR EXOCYCLIC RINGS FROM 4,5,6,7-TETRAHYDROINDOLES

Article abstract of DOI:10.1016/S0040-4039(00)95308-5

The 3-alkyl-4,5,6,7-tetrahydroindoles 4a and 4b reacted with lead tetraacetate in acetic acid to give the corresponding 7-acetoxy derivatives; hydrolysis, followed by treatment with potassium ferricyanide in refluxing acetic acid afforded the novel porphyrins 6a and 6b.