Molybdooxaziridine–Molybdodioxirane Tandem Catalysis: Synthesis of α-Nitrosulfones from Styrenes

. The reaction works with high yields and stereoselectivites for styrenes with a wide variety of substitution patterns. An atom transfer-radical addition mechanism involving the formation of a Ts radical, difunctionalization, nitroso-oxime isomerization, and final oxidation has been proposed. Initial kinetic and mechanistic data indicates a tandem catalytic process and provides evidence for the proposed mechanism.