Generation of 15N labelled bis(polyfluoroalkyl) nitroxides and their hydrogen-abstraction reactions with alkanes, alkylbenzenes and aldehydes
作者:Cheng-Xue Zhao、Guo-Fei Chen、Xi-Kui Jiang
DOI:10.1016/s0022-1139(00)81074-x
日期:1988.3
Blue solutions containing 15 labelled bis(polyfluoralkyl) nitroxides and spin traps, polyfluoronitrosoalkanes, were conveniently made from the reactions of Na15NO2 with polyfluoro-compounds, (RFCO2) and RFSO2Br in F113. It has been found that the nitroxides effected fast H-abstraction from alkanes, alkylbenzenes, aldehydes and the radicals derived from the substrates were in turn effectively trapped
由Na 15 NO 2与多氟化合物(R F CO 2)和R F SO 2 Br在F113中的反应可方便地制备包含15个标记的双(聚氟烷基)氮氧化物和自旋阱,多氟亚硝基链烷的蓝色溶液。已经发现,氮氧化物有效地从烷烃,烷基苯,醛中快速吸氢,而衍生自底物的自由基又被R F 15 NO有效地捕获,得到15 N标记的可通过ESR检测的自旋加合物。N越大(15 N)值以及氮氧化物和自旋加合物的简单拆分,使得对H原子吸收和其他自由基反应的动力学研究变得十分可行。
Bis(perfluoroalkyl) nitroxides and perfluoroalkyl nitroalkyl nitroxides generated in SET reactions between perfluorodiacyl peroxides and nitroalkane salts
ESR detection of bis(perfluoroalkyl) nitroxides 11 and perfluoroalkyl nitroalkyl nitroxides 12 in accord with expected products suggests an electron transfer mechanism for the reactions between nitroalkane salts 1 and perfluorodiacyl peroxides 2. Nitroxides 11 and 12 are the spin-adducts of radical intermediates R1R2C·NO2 (3) and R·f (10) with the nitroso-trap RfNO (9) generated in the reactions. These
根据预期产物对双(全氟烷基)氮氧化物11和全氟烷基硝基烷基氮氧化物12的ESR检测表明,硝基烷盐1与全氟二酰过氧化物2之间反应的电子转移机理。硝基氧化物11和12是自由基中间体R 1 R 2 C · NO 2(3)和R · f(10)与亚硝基阱R f NO(9)的自旋加合物)在反应中生成。这些反应已成为一些含氮底物单电子氧化机理研究中的有用技术。
Heptafluoropropylation of Various Substituted Thiophenes with Bis(heptafluorobutyryl) Peroxide. Preparation of 3-Heptafluoropropylthiophene
The heptafluoropropylations of several substituted thiophenes with bis(heptafluorobutyryl) peroxide were studied. The orientations of the heptafluoropropylation were examined and compared with those of usual electrophilic substitution. The method for the preparation of 3-heptafluoropropylthiophene was also explored.
Direct heptafluoropropylation of purines with bis(heptafluorobutyryl) peroxide
作者:Masakazu Nishida、Shozo Fujii、Hiroshi Kimoto、Yoshio Hayakawa、Hideo Sawada、Louis A. Cohen
DOI:10.1016/s0022-1139(00)80492-3
日期:1993.11
Some silylated purines react with bis(perttuorobutyryl) peroxide to provide ring-C3F7 derivatives. The introduction of the C3F7 group occurs predominantly at C-8: 6-methoxypurine also gave the C-2 isomer in isolable yield. Replacement of the 6-amino group of adenine with dimethylamino or methoxy improved the yields of the C3F7 derivatives.
一些甲硅烷基化的嘌呤与双(过氧叔丁酰)过氧化物反应以提供环-C 3 F 7衍生物。C 3 F 7基团的引入主要发生在C-8:6-甲氧基嘌呤也可分离地得到C-2异构体。用二甲基氨基或甲氧基取代腺嘌呤的6-氨基基团改善了C 3 F 7衍生物的产率。
Fluoroalkyl iodide and its production process
申请人:Furuta Shoji
公开号:US20070249876A1
公开(公告)日:2007-10-25
A process for producing a fluoroalkyl iodide as a telomer R
f
(CF
2
CF
2
)
n
I (wherein R
f
is a C
1-10
fluoroalkyl group, and n is an integer of from 1 to 6) by telomerization from a fluoroalkyl iodide represented by the formula R
f
I (wherein R
f
is as defined above) as a telogen and tetrafluoroethylene (CF
2
CF
2
) as a taxogen, which comprises a liquid phase telomerization step of supplying a homogeneous liquid mixture of the telogen and the taxogen from the lower portion of a tubular reactor, moving the mixture from the lower portion towards the upper portion of the reactor in the presence of a radical initiator over a retention time of at least 5 minutes while the reaction system is kept in a liquid phase state is under conditions where no gas-liquid separation will take place, so that the taxogen supplied to the reactor is substantially consumed by the reaction in the reactor, and drawing the reaction product from the upper portion of the reactor.