Synthesis and Structure of Reaction Products Obtained from 1,2-Epoxyperfluorobutane and Bifunctional Nucleophilic Reagents.

1,2-Epoxyperfluorobutane readily reacts with bifunctional nucleophilic reagents to provide heterocyclic compounds with a pentafluoroethyl substituent. The reaction of this epoxide with thiourea and acetone thiosemicarbazone gave rise to 2-amino-5-pentafluoroethyl-5-fluoro-4(5H)-thiazolinone and 2-isopropylidenehydrazono-5-pentafluoroethyl-5-fluoro-4-thiazolidinone respectively. The reaction of 1,2-epoxyperfluorobutane with o-phenylenediamine and 2,3-diaminonaphthalene afforded in high yields 3-pentafluoroethyl-2(1H)-quinoxalinone and 3-(pentafluoroethyl)benzo[g]-2(1H)-quinoxalinone. The molecular and crystal structure of the obtained fluorine-containing heterocycles was established by XRD analysis.