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Substituted dipyrromethanes and their preparation

United States Patent

5,599,948
February 4, 1997
View the Complete Patent at the US Patent & Trademark Office
New chemical compounds, bis(pyrrol-2-yl)halocarbylmethanes, also known as meso-halocarbyl dipyrromethanes, are made by recting pyrrole in either of two reaction schemes. Once such scheme converts pyrrole through an intermediate, a halocarbyl carbonyl pyrrole, to a [2-(1-hydroxyl-1-hydro-1-halocarbyl)pyrrole], and then converts the latter to the desired halocarbyldipyrromethane; the last step in this scheme is a novel and useful method in itself. The other such sequence converts pyrrole, by reaction with a halocarbyl aldehyde, directly to the desired halocarbyl dipyrromethane.
Wijesekera; Tilak (Glen Mills, PA)
Sun Company, Inc. (Philadelphia, PA)
08/ 641,796
May 2, 1996
The Government of the United States of America has rights in this invention pursuant to Cooperative Agreement No. DE-FC21-90MC26029 awarded by the U.S. Department of Energy.