New approach towards meso-substituted trans-A(2)B-corroles from alkyl oxalyl chlorides and dipyrromethanes

作者：Koszarna Beata; Voloshchuk Roman; Gryko Daniel T^*

来源：Synthesis, 2007, (9): 1339-1342.

DOI：10.1055/s-2007-965988

• aldehydes
• corroles
• macrocycles
• oxidations
• pyrroles

A one-pot synthesis of frans-A(2)B-corroles via the condensation of dipyrromethanes with alkyl oxalyl chlorides followed by the macrocyclization mediated by DDQ has been developed. After thorough examination of different substrates, only reactive acid chlorides have been found to be suitable for this transformation. It was proved that these conditions work well for dipyrromethanes possessing various electron-withdrawing or sterically hindered substituents. No porphyrins are formed under these conditions. The whole sequence implies the formation of a ketone followed by its reaction with the second molecule of dipyrrornethane and oxidation of a bilene to the respective corrole. Under the present reaction conditions, the use of typical dipyrromethanes and aromatic/aliphatic acid chlorides did not lead to the formation of corroles.

• 出版日期2007-5-4