Stereochemistry of Addition of Organocopper Reagents and of the Hydride Ion to 1-(Arylsulfonyl)bicyclobutanes

Article abstract of DOI:10.1021/jo00216a027

Addition of methylmagnesium iodide/cuprous iodide or of lithium dimethylcuprate to 2-exo- and 2-endo-methyl-1-(phenylsulfonyl)bicyclo<1.1.0>butane and determination of the relative geometry of the methyls in the 2,3-dimethylcyclobutanes obtained allowed u