ChemInform Abstract: The Chemistry of Pyrrolic Compounds. Part 63. Synthetic Studies of Petroporphyrins with Fused Six‐Membered Ring Systems.

Abstract

ChemInform Abstract The title compound (V) is synthesized by a strategy involving formation of the porphyrin macrocycle (III), followed by cyclization of a propanoyl chloride side chain in the presence of SnCl4. The macrocycles fused with a six-membered ring system are of interest in connection with the question, if petroporphyrins found in petroleum and similar deposits in general have their origin in chlorophylls which were part of living systems of past geological ages (yields in g).