Two facile routes for synthesis of symmetrical 5,5'-dicyanodipyrrylmethanes

摘要

4-Ethyl-3,5-dimethyl-2-pyrrolecarbonitrile has been synthesized and subjected to either sulfuryl chloride at low temperature or lead tetraacetate to give the corresponding #alpha#-chloromethyl and #alpha#-acetoxymethyl derivatives respectively. These two derivatives are easily converted to bis(5-cyano-4-methyl-3-ethyl-2-pyrryl)methane 7.