Diphosphines diphosphine monosulfide

A solii. of equimolar amounts of diphenylphosphine and dimethylvinylphosphine sulfide in tetrahydrofuran treated with a catalytic amount of K- rFbutoxide, and refluxed 26 hrs. after the exothermic reaction has subsided -> intermediate diphosphine monosulfide (Y 91%) allowed to react with excess LiAlH4 in refluxing dioxane product (Y 80%). F. e. s. R. B. King, J. C. Cloyd, Jr., and P. K. Hendrick, Am. Soc. 95, 5083 (1973). 

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