1: 1,3-dimercaptopropane With trimethylaluminum in dichloromethane; toluene T=20°C; 0.5 h; 2: 3-methyltetrahydro-2H-pyran-2-one in dichloromethane; toluene 20 h; Heating; Further stages.;

1: 2-(trimethylsilyl)-1,3-dithiane With n-butyllithium in tetrahydrofuran; hexanes T=-78 - 0°C; 1 h; 2: 5-hydroxypentan-2-one in tetrahydrofuran; hexanes T=20°C;

hydrogenchloride in water; acetonitrile T=25°C; var. ionic strength and CH3CN to H20 ratio; Rate constantMechanismProduct distribution;

hydrogenchloride in water; acetonitrile T=25°C; var. ionic strength and CH3CN to H20 ratio; Rate constantMechanismProduct distribution;