in diethyl ether; dichloromethane byproducts: AgCl; addn. of a dichloromethane-diethyl ether soln. of the Au-educt to an equiv. amt. of tetrahydrothiophen in diethyl ether, addn. of an equiv. amt. of AgClO4; 1 h stirring at 25°C;; filtration, concentration of the filtrate in vac., addn. of diethyl ether, separation; elem. anal.;

in dichloromethane