Radical additions to fluoroolefins. Thermal reaction of perfluoroallyl chloride with perfluoroalkyl iodides as a selective synthesis of terminal perfluoroolefins
Reaction of perfluoroallyl chloride with perfluoroalkyl iodides, RFI (RF = C4F9, C6F13, C8F17), in an autoclave at 180–250 °C gave terminal perfluoroolefins, CF2-CF-CF2-RF (2–4) as the sole reaction products. Isomeric fluoroolefins containing an internal double bond and telomeric products were not observed in the reaction mixture. The yields were dependent on the reaction temperature and on the chain
全氟烯丙基氯与全氟烷基碘R F I(R F = C 4 F 9,C 6 F 13,C 8 F 17)在高压釜中于180–250°C反应,得到末端全氟烯烃CF 2 -CF-CF 2 -R F(2-4)作为唯一反应产物。在反应混合物中未观察到含有内部双键的异构氟代烯烃和端粒产物。收率取决于反应温度和R F I的链长:烯烃2(R F在200°C(26%)下获得= C 4 F 9),而在烯烃3和4(分别为R F = C 6 F 13和C 8 F 17)的合成中,在250°C下获得最高收率(分别为41%和74%)。CuI或过氧化物引发剂的存在对产物的产率具有负面影响。在产物2–4的质谱图中,已将公式指定给碎片,并已提出了碎片序列。
Perfluoroalkenyl ethers of bile alcohols
作者:A.A. Malik、C.M. Sharts
DOI:10.1016/s0022-1139(00)81040-4
日期:1988.12
Two synthetic routes are presented for the synthesis of bis- and tris-perfluoroalkenyloxy-substituted bile alcohols with an unsubstituted hydroxyl group in the hydrocarbon sidechain. The first route involves selective protection of the 24-hydroxyl group of 3α, 7α, 12α, 24-cholan-tetrol followed by the attachment of 3α, 7α, 12α-hydroxyl groups to the perfluoroalkenyloxy linkages and removal of the
viable within a versatile manganese(I) catalysis manifold. Thus, a wealth of fluorinated alkenes were employed in C–F/C–H functionalizations through facile C–H activation. The robust nature of the manganese(I) catalysis regime was among others reflected by the first C–F/C–H activation with perfluoroalkenes as well as racemization-free C–H functionalizations on imines, aminoacids, and peptides.
The present invention provides a non-aqueous electrolyte solution which contains a silyl ester group-containing phosphonic acid derivative.
本发明提供了一种含有硅酯基磷酸衍生物的非水电解质溶液。
Chain-extension reactions via insitu capture of the dibromofluoromethide ion with difluoromethylene fluoro-olefins
作者:Donald Joseph Burton、Steven W. Hansen
DOI:10.3998/ark.5550190.0011.806
日期:——
The insitureaction of triphenylphosphine, tribromofluoromethane, and a difluoromethylene olefin successfully allows the capture of the intermediate dibromofluoromethideion. With fluorinated propenes, the product is an allylic dibromofluoromethyl alkene; with longer chain fluoro-olefins the major product is a 1-bromo-1,3-fluorinated diene derivative. Pentafluoropyridine yields 4-dibromofluorometh