D. Grandjean et al., SYNTHESIS OF OPTICALLY PURE TRISUBSTITUTED ETHYNYLOXIRANES BY OXIRANEDEPROTONATION, Tetrahedron : asymmetry, 4(9), 1993, pp. 1991-1994
Optically pure ethynyloxiranes were easily deprotonated by nBuLi and t
he corresponding anions trapped by various electrophiles, providing a
stereocontrolled access to optically pure trisubstituted ethynyloxiran
es.