1: carbon monoxide With tris-(dibenzylideneacetone)dipalladium(0); tri-cyclo-hexyl-phosphine in tetrahydrofuran T=20°C; P=760.051 Torr; 0.0166667 h; Inert atmosphere; 2: (E)-4-phenyl-3-buten-2-one With chloro-trimethyl-silane in tetrahydrofuran T=20°C; 0.166667 h; 3: diethylzinc in tetrahydrofuran T=20°C;

oxygen; copper(l) chloride; palladium in N,N-dimethyl-formamide

potassium permanganate; silica gel in benzene Heating;

1: AlCl3 / CH2Cl2 / 2 h / -20 °C 2: NaOMe, NH4OAc / TiCl3 / methanol; H2O / 15 h / Ambient temperature; pH=5 3: 93 percent / O2/CuCl / Pd / dimethylformamide View Scheme

1: methanol 2: KF-18-crown-6 / acetonitrile / 3 h / Heating 3: KMnO4-silica gel / benzene / 2 h / 70 °C View Scheme

1: KF-18-crown-6 / acetonitrile / 3 h / Heating 2: KMnO4-silica gel / benzene / 2 h / 70 °C View Scheme