pyridine; oxygen; 2-methylpropane-2-thiol; p-toluenesulfonyl chloride 1) toluene, irradiation, room temperature, 15 min; 2) 3 h, room temperature; Yield given. Multistep reaction;

in dichloromethane T=0°C; 0.5 h; Irradiation;

oxygen; 2-methylpropane-2-thiol in toluene T=80°C; 1 h; adding 15 min; Yields of byproduct given;

oxygen; 2-methylpropane-2-thiol; phosphorous acid trimethyl ester 1) toluene, 80 deg C, 60 min; 2) (MeO)3P, room temperature, 120 min; Yield given. Multistep reaction;