 an epihalohydrin, in a two phase mixed solvent composed of water and an organic solvent in {HEAD ~ the presence} of {TAIL ~ a base} and a phase transfer catalyst 
of
an epihalohydrin , in a two phase mixed solvent composed of water and an organic solvent in { HEAD ~ the presence } of { TAIL ~ a base } and a phase transfer catalyst
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH