sodium hydroxide; methyl iodide; dicobalt octacarbonyl; N-hexadecyl-N,N,N-trimethylammonium bromide in benzene P=760 Torr; Ambient temperature;

hydrogenchloride in water T=100°C; 24 h;

2-mercapto-pyridine; C12H6F18Fe3O16 in 1,2-dichloro-ethane T=60°C; 24 h;

1: 1) lithium chloride, t-butyl lithium / 1) THF, pentane, -78 deg C, 30 min, 2) THF, pentane, a) -78 deg C, 10 min, b) 25 deg C, 5 h 2: 91 percent / 6N HCl / H2O / 24 h / 100 °C View Scheme