ChemInform Abstract: An Efficient Route to 1,2-Bis(9′-bromodipyrrin)ethane.

✍ Scribed by Q. CHEN; X. LI; B. CHEN

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 33 KB
• Volume: 29
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199849144

✦ Synopsis

An Efficient Route to 1,2-Bis(9'-bromodipyrrin)ethane.

-A novel, highly efficient procedure for preparing the title compounds (IV), important intermediates for isoporphyrins, homobiliverdins and -bilirubins, based on the bromination of the corresponding carboxy derivatives (III) is described. Bromination with high excess of bromine leads to the tetrabromo substituted bis(dipyrrin)ethenes (V). -(CHEN, Q.;