catalyst: p-MeOC6H4SH in tetrahydrofuran Ar-atmosphere; addn. of 2.5 equiv. of Sn-compd. to alkyne, then addn. of1 equiv. of p-MeOC6H4SH soln., stirring (room temp., 24 h); distn. (1E-4 mm Hg); elem. anal.;

N-benzyl-N,N,N-triethylammonium chloride in N,N-dimethyl-formamide 6 h; Ambient temperatureother reagent: CsF, other solvent: THF/DMF, various reactants ratio, other reaction time; MechanismProduct distribution;