Reactions of tetrafluoroethylene oligomers. Part 1. Some pyrolytic reactions of the pentamer and hexaher and of the fluorine adducts of the tetramer and pentamer
作者:Paul L. Coe、Simon F. Sellers、John Colin Tatlow、Harold C. Fielding、Graham Whittaker
DOI:10.1016/s0022-1139(00)82660-3
日期:1981.10
3-dimethylpentane (X), and perfluoro-3,4- dimethylhexane (III). Pyrolysis of IV in the presence of bromine gave (VI) and 3-bromo-3-trifluoromethyl-decafluoropentane (XI): with toluene, pyrolysis gare VlI and 3H-3-trifluoromethyldecafluoropentane (XII). Pyrolysis of II at 500° over glass gave perfluoro-1,2,3-trimethylcyclobutene (XIII) and perfluoro-2,3-dimethylpenta-1,3(E)- and (Z)-diene (XIV) and (XV) respectively
Polyfluoro-1,2-epoxy alkanes and cycloalkanes. Part IV [1]. Thermal reactions of the epoxides of the pentamer and hexamer oligomers of tetrafluoroethene
Co-pyrolysis of (1) with bromine afforded (E) and (Z) 2-bromoperfluoro-3-methylpent-2-ene (6a, 6b), whilst with toluene, (E) and (Z) 2H-perfluoro-3-methylpent-2-ene (7a, 7b) were obtained: (1) with excess cyclohexene also gave (7a, 7b). The oxiran (2), on pyrolysis alone, gave only (3). In the presence of bromine, (2) gave an equimolar mixture of 1-bromoperfluoro-3-methylpentan-2-one (8) and 3-bromoperfluoro-3-methylpentane
Reactions of tetrafluoroethene oligomers Part XII [1] cycloaddition reactions of 3,3,4,4,4-pentafluoro-2-pentafluoroethyl-2-trifluoromethyldiazobutane. A novel synthesis of pyrazoles
作者:Paul L. Coe、Michael I. Cook
DOI:10.1016/s0022-1139(00)82868-7
日期:1989.12
diazoalkane (1) reacts smoothly with a variety of electron deficient alkenes to give, unexpectedly, the corresponding pyrazole derivatives. Thus, reaction with methyl or ethyl propenoate affords the methyl and ethyl esters of pyrazole-3-carboxylic acid (2) and (3). Reaction with diethyl maleate yields 3,4-bis-(ethoxycarbonyl>pyrazole (4), and dimethyl maleate gives the corresponding dimethyl ester (5). Treatment
Reactions of tetralouroethene oligomers Part 6. Some reactions of 4-diazo-1,1,1,2,2-pentaflouro-3-pentaflouethyl-3-triflouromethylbutane
作者:Paul L. Coe、Michael I. Cook、Nicholas J. Goodchild、Philip N. Edwards
DOI:10.1016/s0022-1139(00)85069-1
日期:1986.12
remarkable decomposition reaction, the alkane RfH (2). Reaction of (3) with excess sodium nitrite affords the isocyanate RfNCO (4) which is stable to water,but which reacts with ammia to give the urea RfNHCONH2 (5); this latter was not readily hydrolysed .Photolysis of (3) yields the diazadiene RfCHNNCH Rf (7). Thermolysis of (3) alone afforded the diazadiene (7), but reaction in the presence of copper
异氰酸酯R f CH 2 NCO(R f = CF 3(C 2 F 5)2 C)在强酸性条件下反应形成盐R f CH 2 NH 3 (+) HSO 4 (-)(1) ,用亚硝酸钠处理时,重氮烷R f CHN 2(3)。通过显着的分解反应,将(1)溶解在DMSO中,得到烷烃R f H(2)。(3)与过量的亚硝酸钠反应,得到异氰酸酯R fNCO(4)对水稳定,但会与氨反应生成尿素R f NHCONH 2(5);这后者不容易水解.Photolysis的(3)得到二氮杂二烯- [R ˚F CHNNCHř ˚F(7)。单独热解(3)得到二氮杂二烯(7),但在高氯酸铜(II)存在下反应得到(7)和醛R f CHO(6)
Coe, Paul L.; Cook, Michael I.; Goodchild, Nicholas J., Journal of the Chemical Society. Perkin transactions I, 1988, p. 555 - 558
作者:Coe, Paul L.、Cook, Michael I.、Goodchild, Nicholas J.、Edwards, Philip N.