F. Chemla et al., Preparation of propargylic carbenoids and reactions with carbonyl compounds - A stereoselective synthesis of propargylic halohydrins and oxiranes, EUR J ORG C, (17), 2001, pp. 3295-3300
The preparation and the reactivity of the zincioallene 3 is described, This
organometallic compound reacts with aldehydes to yield propargylic halohyd
rins with good diastereo selectivities. These halohydrins can easily be con
verted into propargylic oxiranes.