pyridine; copper(l) chloride in tetrahydrofuran T=20°C; 2 h;

1: cyclohexanone-oximeFRProcd With chlorine in tert-butyl methyl ether T=-10°C; 0.25 h; Inert atmosphere; 2: benzyl chloroformate With sodium carbonate in water T=15°C; 0.166667 h; 3: With cyclopenta-1,3-diene 3 h;

sodium hydrogencarbonate in water; toluene T=0°C; 24 h;

1: 94 percent / chloronitrosocyclohexane / diethyl ether; ethanol / 3 h / 0 °C 2: 80 percent / aq. NaHCO3 / toluene; H2O / 24 h / 0 °C View Scheme

lead dioxide in dichloromethane 0.5 h; Ambient temperature;