tert.-butylhydroperoxide; silver hexafluoroantimonate; [Pd(Quinox)Cl2] in dichloromethane; water T=0 - 20°C; Wacker type oxidation; Darkness;

in water T=35°C; 4 h;

1: 4-lt;N-(tertbutoxycarbonyl)aminogt;benzyl alcohol With 1,10-phenanthroline; potassium tert-butylate; copper(l) chloride in o-di-fluorobenzene T=20°C; 0.166667 h; Inert atmosphere; 2: With 1-methyl-1H-imidazole; di-tert-butylazodicarboxylate; oxygen in o-di-fluorobenzene Reflux; 3: diazomethyl-trimethyl-silane With triphenylphosphine; isopropyl alcohol in o-di-fluorobenzene; diethyl ether T=60°C; Inert atmosphere;

in water; ethyl acetate