Synthesis and photochemistry of 2-styrylpyrroles. Intermolecular photoaddition of pyrroles to a double bond

Article abstract of DOI:10.1002/recl.19951141109

Irradiation of the 2-styrylpyrroles 3 and 5 resulted in intermolecular addition of the pyrrole derivative to the double bond of a second molecule in a regiospecific way to give the dimeric products 6 and 7 as the main products.The N-methyl-substituted derivative 4 did not show the same reaction, but reacts as the corresponding furan derivative.