1: 50 percent / LiCl; qa. sodium hypochlorite; NaCl / dimethylsulfoxide; pentane / cooling 2: 42 percent / nitronium tetrafluoroborate / nitromethane / 0.5 h / 0 °C 3: tetra-n-butylammonium fluoride / CD3CN / 10 h / 0 - 25 °C View Scheme

pyridine in dichloromethane T=20°C; 4 h;

1: hydroxylamine / diethyl ether / 2 h / cooling 2: pyridine / CH2Cl2 / 4 h / 20 °C View Scheme

1: 100 percent / triethylamine / diethyl ether / 1 h / -10 °C 2: hydroxylamine / diethyl ether / 2 h / cooling 3: pyridine / CH2Cl2 / 4 h / 20 °C View Scheme

sodium hypochlorite; lithium chloride in methanol; water T=0°C; 0.5 h;

1: 50 percent / LiCl; qa. sodium hypochlorite; NaCl / dimethylsulfoxide; pentane / cooling 2: 42 percent / nitronium tetrafluoroborate / nitromethane / 0.5 h / 0 °C View Scheme