3-THIABICYCLO-3,3,0-OCT-5-EN-7-ONES BY DMSO/DMS PROMOTED INTRAMOLECULAR PAUSON-KHAND REACTION

3-Thiabicyclo-[3,3,0]-oct-5-en-7-ones have been prepared by intramolecular Pauson-Khand reaction on allylpropargylsulfide cobalt complexes in benzene with dimethylsulfoxide as promoter and dimethylsulfide in 65-80% yield.