
%0 Journal Article
%A Clezy, PS 
%A Prashar, JK 
%T The Chemistry of Pyrrolic Compounds. LXIII. Synthetic Studies of Petroporphyrins With Fused Six-Membered Ring Systems
%J Australian Journal of Chemistry
%D 1990/05/01
%V 43
%N 5
%P 825-837
%K 
%R https://doi.org/10.1071/CH9900825
%U https://www.publish.csiro.au/paper/CH9900825 
%X Several approaches to the synthesis of porphyrins bearing fused six- membered ring systems were explored with the aim of obtaining the petroporphyrin (4a). This was ultimately achieved by an intramolecular  cyclization of a porphyrin with a propanoyl chloride side chain in the presence of stannic chloride. Methylation of the intermediate ketone with CH3Li and reduction of the resultant alcohol with NaBH3CN/Znl2 furnished (4a). 
