T=-78°C; 70 h; Irradiation;

pyridine in diethyl ether T=10°C; 0.5 h; addition -20 deg C to -10 deg C;

1: 65 percent / 30 percent aq. H2O2 / H2SO4 / 1 h / 10 °C / addition 10 to 20 deg C 2: 94 percent / pyridine / diethyl ether / 0.5 h / 10 °C / addition -20 deg C to -10 deg C View Scheme

T=-78°C; 70 h; Irradiation;