Polyfluoro-1,2-epoxy-alkanes and -cycloalkanes. Part III. Some 1,2-epoxides derived from oligomers of tetrafluoroethylene
作者:Paul L. Coe、Alan Sellars、John Colin Tatlow
DOI:10.1016/s0022-1139(00)84973-8
日期:1983.8
(C2F5)2(CF3)C−; R2 = (C2F5)(CF3)(F)C−; R3 = F) reacted with aqueous sodium hypochlorite/ acetonitrile to give high yields of the corresponding 1,2-epoxides. Perfluoro-1-methyl-2-(1-methylpropyl)cyclobutene (derived from the hexamer by pyrolysis) and perfluoro-4-ethyl-2,3,4,5-tetramethyl-4,5-dihydrofuran (made by hydrolysis of the pentamer) also underwent efficient epoxidation. The epoxy-oxolan decomposed in two
三个低聚物([R 1 ] [R 2 ] C = C [R 3 ] [F])四氟乙烯,三聚体(R 1 = C 2 ˚F 5 - ; R 2 = R 3 = CF 3 - ),五聚体(R 1 =(C 2 ˚F 5)2(CF 3)C-; R 2 = R 3 = CF 3 - )和六聚体的主要异构体(R 1 =(C 2 ˚F 5)2(CF 3)C- ; R 2=(C 2 F 5)(CF 3)(F)C-;R 3= F)与次氯酸钠/乙腈水溶液反应,得到高产率的相应的1,2-环氧化物。全氟-1-甲基-2-(1-甲基丙基)环丁烯(通过热解衍生自六聚体)和全氟-4-乙基-2,3,4,5-四甲基-4,5-二氢呋喃五聚体)也进行了有效的环氧化。环氧-氧杂戊烷在280–480°C下以两种方式分解,一种过程可能通过自由基途径生成四氟乙烯的三聚体,另一种过程涉及到氟离子,生成十四氟-3,4-二甲基己基-3-烯-2-一