after 1.5 h. Similar isolated yields of dichlorocyclopropanes have been obtained for a variety of substituted alkenes and are presented in Table I. In general, reaction times and yields compare favorably with analogous phase-transfer procedures reported in the literat~ e.~" While small-scale preparations gave excellent and reproducible results, larger reactions (> 5 mmol of alkene) gave poor conversions; we assume that this is due to the limited power of ...
