- A long the chain contains the fluorine process for the preparation of an olefin
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The invention relates to a preparation method of long-chain fluorine-containing alkene. The preparation method comprises the following steps: (1) addition reaction: continuously introducing fluorine-containing monomers into a reactor with a perfluoroalkyl group iodine solution and a radical initiator contained, regulating the pressure difference of front and rear fluorine-containing monomers inside the reactor to control the flow rate of the fluorine-containing monomers, carrying out the addition reaction through a bubbling method, preparing an addition product, and after the reaction is finished, carrying out reduced pressure distillation to obtain the addition product with certain purity; and (2) elimination reaction: removing HI of the addition product under an alkaline condition to obtain a long-chain alkene product. The preparation method disclosed by the invention can be used for preparing the long-chain fluorine-containing alkene through two-step reaction, namely addition and removal, and by adopting perfluoroalkyl group iodine and the fluorine-containing monomers as raw materials, the method is high in selectivity, simple, environment-friendly and easy to implement.
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Paragraph 0038; 0039
(2017/03/18)
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- The Reaction of 2-X-1,2-Difluoroalk-1-enyldifluoroboranes with Xenon Difluoride. A Methodical Approach to 1,2-Difluoroalk-1-enylxenon(II) Salts
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2-X-1,2-Difluoroalk-1-enylxenon(II) salts were prepared by the reaction of XeF2 with XCF=CFBF2 (X = F, trans-H, cis-Cl, trans-Cl, cis-CF3, cis-C2F5) but no organoxenon(II) compounds were obtained when the trans-isomers of boranes, trans-XCF=CFBF 2 (X = CF3, C4F9, C 4H9, Et3Si), were used under similar conditions.
- Frohn, Hermann-Josef,Adonin, Nicolay Yu.,Bardin, Vadim V.
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p. 2499 - 2508
(2008/10/09)
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- Transformations of F-Alkyl Iodides and Bromides Induced by Nickel(0) Carbonyl
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Adducts of primary F-alkyl iodides with nickel carbonyl are formed readily in donor solvents and pyrolyze at 100-150 °C to give olefinic coupling products in high yield. The mechanism proposed to account for the observed chemistry involves preferential α-elimination of fluorine with formation of a carbenoid species complex coordinated to nickel. Differences in reaction paths among several types of substrate halides are rationalized on the basis of polarization of the Ni-C bond in the adducts. Support for these proposals is provided by state-of-the-art calculations.
- Krespan, Carl G.,Dixon, David A.
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- REACTIVITE DES PERFLUOROHALOGENOALCANES EN PRESENCE DE COUPLES METALLIQUES. REACTIVITE DE PERFLUOROIODOALCANES SUR DES DERIVES HALOGENES DANS DES SOLVANTS APROTIQUES DISSOCIANTS (DMSO, DMF).
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Perfluoroalkyl iodides (RFI) reacts with organic halide in dissociants solvents (DMF, DMSO) in the presence of zinc-copper couple through an organometallic route; in this way C6F13Cl, C6F13CH2CH2I, (C6F13)2Zn have been prepared.
- Blancou, H.,Commeyras, A.
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p. 255 - 266
(2007/10/02)
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