A common approach to cyclopropyl derivatives5 involves a gamma elimination of hydrogen halide, where an &-hydrogen is activated by a carbonyl, nitrile, or other electron-withdrawing group. In view of the pseudo-acidity of the CY-hydrogen of sulfones6 this method was applied to y-halopropyl sulfones, using sodium amide,'which had been found to be a suitable base for converting y-chlorobutyronitrile into cyclopropyl cyanide. Treatment of y- ...