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Preparation of porphyrins and their metal complexes

United States Patent

*** EXPIRED ***
5,659,029
August 19, 1997
View the Complete Patent at the US Patent & Trademark Office
A hydroxyl-containing pyrrolic compound having a hydroxyl group or a hydroxyl-containing group in the 2-position, optionally substituted in the beta positions, is condensed in an acidified two immiscible phase solvent system to produce excellent yields of the corresponding porphyrin or metal porphyrin.
Ellis, Jr.; Paul E. (Downingtown, PA), Langdale; Wayne A. (Wenonah, NJ)
Sun Company, Inc. (R&M) (Philadelphia, PA)
08/ 575,783
December 22, 1995
The Government of the United States has rights in this invention under Department of Energy Contract No. DE-FC21-90MC26029.