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Communication | Special issue | Vol 7, No. 2, 1977, pp.831-838
Published online, 1st January, 1970
DOI: 10.3987/S-1977-02-0831
The Synthesis of Porphyrins via Dipyrromethenes

John B. Paine. III, Chi Kwong Chang, and David Dolphin*

*Department of Chemisry, University of British Columbia, Vancouver 8, V5T 1W5, Canada


The Fischer porphyrin synthesis from dipyrromethene precursors has been improved. The same conditions (bromine in refluxing anhydrous formic acid) which give enhanced yields of centrosymmetric porphyrins from 5-bromo-5’-methyl-2,2’-dipyrromethenes also give substantially higher yields of porphyrins derived from readily available 5,5’-dimethyl and 5,5’-dibromodipyrromethenes.