Interaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene with Br-2: in a MeC
OOH medium results in the product of selective bromination of the hydr
ocarbon double bond, 5,6-dibromo-1,1,2,3,3-pentafluoro-1-hexene. Epoxi
dation of the latter with H2O2 in an alkaline medium followed by debro
mination afforded 5,6-epoxy-4,4,5,6,6-pentafluoro-1-hexene for the fir
st time.