An Efficient Route to 1,2-BIS(9′-Bromodipyrrin)ethane

Abstract

1,2-Bis(9-bromodipyrrin)-ethane, an important imtermediate for isoporphyrins (porphyrin isomers), homo-biliverdins and -bilrubins, is synthesized with excellent yield by bromination of the corresponding 1,2-bis(9-carboxydipyrrin)-ethane, which is distinctly shorter and more efficient than the literature report.