Regioselective photo-oxygenation of 2-aryl-4,5,6,7-tetrahydroindoles: preparation and reactions of 2-aryl-7a-hydroperoxy-4,5,6,7,7a-pentahydroindolenines
Abstract
Dye-sensitized photo-oxygenation of 2-aryl-4,5,6,7-tetrahydroindoles quantitatively afforded 2-aryl-7a-hydroperoxy-4,5,6,7,7a-pentahydroindolenines, which were converted into the corresponding hydroxy-indolenines and spiro-γ-lactams in excellent yields.