3-chloro-benzenecarboperoxoic acid in chloroform 12 h; below 10 deg C;

1: sulfur 2: PhIO / 1 percent RuCl2(PPh3)3 / CH2Cl2 / 0.25 h View Scheme

iodosylbenzene; tris(triphenylphosphine)ruthenium(II) chloride in dichloromethane 0.25 h; Yield given. Yields of byproduct given;

anhydrous potassium sulfate

n-butyllithium 1.) THF, -60 deg C, 1 h, 2.) -60 deg C -> room temperature; Yield given. Multistep reaction;

1: 1,1-bis-phenylsulfanyl-pentane With Cp2Ti[P(OEt)3]2 in tetrahydrofuran 0.5 h; 2: 1-methanesulphonyl-2-phenylacetylene in tetrahydrofuran T=25°C; 0.583333 h; 3: With sodium hydroxide in tetrahydrofuran Further stages.;

1: C17H20S2 With Cp2Ti[P(OEt)3]2 in tetrahydrofuran 0.5 h; 2: 1-methanesulphonyl-2-phenylacetylene in tetrahydrofuran T=25°C; 0.583333 h; 3: With sodium hydroxide in tetrahydrofuran Further stages.;

1: 94 percent / diethyl ether; tetrahydrofuran / 1.) -78 deg C, 30 min, 2.) 25 deg C, 12 h 2: 95 percent / benzene / 1.5 h / Irradiation 3: 48 percent / tetrahydrofuran / 1.5 h / -78 - 0 °C / var. sulfonyl substituted cyclopropenes, var. alkyllithium compounds View Scheme