Silver-catalyzed fluoroalkylation of thiols using fluoroalkanesulfinates
摘要:
A practical sliver-catalyzed fluoroalkylation of aryl-, heteroaryl- and allcylthiols has been developed. The reaction has a good functional-group tolerance and excellent selectivity. A variety of stable and solid fluoroalkanesulfinates including di- and perfluoroalkanesulfinates can be employed. This methodology provides a straightforward and streamlined access to perfluoroallcylthiolated organic molecules.[GRAPHICS](C) 2016 Elsevier B.V. All rights reserved.
Photocatalyzed reductive fluoroalkylation of 2-acetoxyglycals towards the stereoselective synthesis of α-1-fluoroalkyl-<i>C</i>-glycosyl derivatives
作者:Erwin W. Mora Flores、María Laura Uhrig、Al Postigo
DOI:10.1039/d0ob01914c
日期:——
anomeric carbon has been developed by a new methodology starting from 2-acetoxyglycals for the first time. Remarkably, the reactions proceeded in only one step, through the visible light-photocatalyzed reductive fluoroalkylation of 2-acetoxyglycals by means of an Ir photocatalyst and employed commercially available fluoroalkyl iodides n-CnF2n+1-I (n = 1, 4, 6) as a source of fluoroalkyl radicals.
通过一种新方法开发了一种良性、高效、区域选择性和立体选择性方案,用于合成在异头碳上具有CF 3、C 4 F 9和 C 6 F 13取代基的 α-1-氟烷基-C-糖基化合物首次从 2-乙酰氧基甘氨酸开始。值得注意的是,反应仅在一个步骤中进行,通过可见光光催化的 2-乙酰氧基乙二醇的还原性氟烷基化反应,借助 Ir 光催化剂并使用市售的氟代烷基碘化物n -C n F 2 n +1 -I ( n= 1, 4, 6) 作为氟烷基自由基的来源。
Electron-catalyzed radical perfluoroalkylation of organic sulfides: the serendipitous use of the TMEDA/I<sub>2</sub> complex as a radical initiator
作者:D. E. Yerien、S. Barata-Vallejo、B. Camps、A. E. Cristófalo、M. E. Cano、M. L. Uhrig、A. Postigo
DOI:10.1039/c7cy00236j
日期:——
The (TMEDA)I·I3 complex as a new radical initiator for the perfluoroalkylation of RSH.
TMEDA)I·I3复合物作为RSH的全氟烷基化的新自由基引发剂。
Radical fluoroalkylation reactions of (hetero)arenes and sulfides under red light photocatalysis
作者:Damian E. Yerien、M. Victoria Cooke、M. Cecilia García Vior、Sebastián Barata-Vallejo、Al Postigo
DOI:10.1039/c9ob00486f
日期:——
Fluoroalkylation reactions of (hetero)aromatics have been accomplished through the low-power illumination from red LEDs (λmax = 635 nm) of commercially available perfluoroalkyl iodides RF-I and phthalocyanine zinc salt as photocatalyst in MeCN : DMF solvent mixture. This methodology has been extended to the perfluorobutylation of sulfides. As far as we are concerned, this is the first report on a perfluoroalkylation
The role of photocatalysts in radical chains in homolytic aromatic substitution, radical addition to olefins, and nucleophilic radical substitution mechanisms
作者:Damian E. Yerien、Sebastián Barata-Vallejo、Erwin W. Mora Flores、Al Postigo
DOI:10.1039/d0cy00921k
日期:——
consequence of the efficiency of the photoinitiation events, i.e., primary radical production, propagation and termination steps. This will have important implications in the understanding and representations of the mechanisms postulated, in terms of closed and open catalytic cycles. One strategy we apply to uncover radical propagating chains in our mechanisms is to explore photocatalysts that operate
FLUORINE-CONTAINING MONOMER, FLUORINE-CONTAINING POLYMER AND SURFACE TREATING AGENT
申请人:YAMAMOTO Ikuo
公开号:US20090029099A1
公开(公告)日:2009-01-29
Disclosed is a fluorine-containing polymer having:
(A) a repeating unit derived from a fluorine-containing monomer which is represented by the following formula:
CH
2
═C(—X)—C(═O)—Y—[—(CH
2
)
m
-Z-]
p
—(CH
2
)
n
—Rf (I)
(B) a repeating unit derived from a monomer containing no fluorine atom, and if necessary (C) a repeating unit derived from a crosslinkable monomer. This fluorine containing polymer has excellent water repellency, oil repellency and antifouling property.