Photo-Arylation. VII. : Photoreaction of 2-Halopyridine with Indole

Abstract

Photolysis of 2-halopyridine with indole afforded the (2-pyridyl)indoles as a regioisomeric mixture. On the basis of the isomer distributions, an electron tansfer mechanism is suggested for the present reaction. The regioselectivity was found to be fairly dependent on the solvent polarity.