Harsha Harsha

Visible-Light-Induced Metal-Free Regioselective C–H α-Carbonyl Alkylation of 4-Aminocoumarins Using 10-Phenylphenothiazine

Abstract We report a visible-light-induced photoredox method for the regioselective C3 α-carbonyl alkylation of 4-aminocoumarin derivatives. The protocol avoids transition metals and uses 10-phenylphenothiazine (PTH) as an efficient, inexpensive organic photocatalyst in place of...