1: 1-phenyl-2-(phenylsulfonyl)ethanone With lithium hexamethyldisilazane in tetrahydrofuran T=-78°C; 2: ethylene,methyl acetate With AgBr; (R,R,Sp,Sp)-bis-N-[2-(Ph2P)ferrocylidene]diiminocyclohexane; bis(η3-allyl-μ-chloropalladium(II)) in tetrahydrofuran T=-20°C;

acetic acid; tetrakis(triphenylphosphine) palladium(0) T=80°C; 1.5 h;

1,8-diazabicyclo[5.4.0]undec-7-ene in benzene Ambient temperature;

in N,N-dimethyl-formamide T=0 - 20°C; Inert atmosphere;

1: 1)(NH4)2S2O8 2: H2O2 / methanol / 4 h / Ambient temperature 3: 10percent NaHCO3 / benzene / 7 h / Heating 4: 90 percent / amberlist / benzene / 3 h / Ambient temperature View Scheme

HEH; Ru(bpy)3Cl2 in pyridine Ambient temperatureIrradiation;

samarium; mercury dichloride in tetrahydrofuran; water T=20°C; Desulfonylation;