Regio- and Stereoselective Synthesis of (E)- and (Z)-Allylsulfones from Aldehydes and Alkynes
Several (E)- and (Z)-1-p-toluenesulfonyl(=tosyl)-2-alkenes, allylsulfones, were regio- and stereoselectively prepared from aldehydes and alkynes, respectively, in good yields by application of the results of our previous investigation on "syn-effect" and