Study of the nucleophilic reaction of 2-mercaptoethanol with 1-fluoroalkyl-2-iodo-alkenes
摘要:
The stepwise nucleophilic addition of 2-mercaptoethanol (2) to 1-fluoroalkyl-2-iodo-alkenes (1) was studied. Fluorine-containing building blocks of a new type (4) containing a fluorine atom, a fluoroalkyl-substituted double bond and a latent carbonyl group were synthesized in good yield via the intermediate thioethers 3. A reasonable pathway is suggested. (C) 1997 Elsevier Science S.A.
这项审查涉及全氟烷基碘化物(R F I)在各种结构的有机物质的合成中的自由基化学。R F I的自由基链反应很容易由偶氮腈引发剂引发,该过程通常可从许多类型的不饱和化合物中获得纯净的产物。该过程称为碘全氟烷基化。在合成含氟有机化合物中,很少有方法可以与R F I自由基加成的效率,成本,选择性和多功能性进行比较。第一部分回顾了从R F I生成R F自由基用于合成目的的所有方面并报告R F的相对反应性I和20个典型的烯烃或炔烃。通过实例和实验数据综合表说明了16种不同类别的烯烃和炔烃的实用合成。特别强调了许多这些新的全氟烷基取代的化合物的新颖重要用途。这篇综述的目的是在50年的时间里,将R F I的研究结果集中到一起,作为含氟有机化合物合成的一个切入点。在本文的后续部分中,还将处理其他类别的化合物。
Access to Perfluoroalkyl-Substituted Enones and Indolin-2-ones via Multicomponent Pd-Catalyzed Carbonylative Reactions
作者:Hongfei Yin、Troels Skrydstrup
DOI:10.1021/acs.joc.7b00942
日期:2017.6.16
A simple method for accessing perfluoroalkyl-substituted enones is described applying a four-component palladium-catalyzed carbonylative coupling of aryl boronic acids together with terminal alkynes and perfluoroalkyl iodides in the presence of carbon monoxide. A wide range of highly functionalized enones can thus be prepared in a single operation in good yields. With 2-aminophenylalkynes, an intramolecular
Convenient Synthesis of Fluoroalkyl-Substituted Heterocycles from 1-Fluoroalkyl-2-iodoalkenes
作者:Hui-Ping Guan、Xiao-Qing Tang、Bing-Hao Luo、Chang-Ming Hu
DOI:10.1055/s-1997-1376
日期:1997.12
A convenient synthesis of fluoroalkyl-substituted heterocycles including 3-trifluoromethylpyrazoles 7, 5-trifluoromethylisoxazoles 8 and 4-trifluoromethylpyrimidines 9 is described. This two-step sequence consists of a radical addition of fluoroalkyl iodides 1 to alkynes 2 to afford the corresponding alkenes 3 and condensation of 3 with hydrazine, hydroxylamine or amidines to give the afore-mentioned heterocycles, respectively. A possible pathway is suggested.
New Efficient Palladium-Catalyzed Perfluoroalkylation of Carbon-Carbon Multiple Bonds with<i>F</i>-Alkyl Iodides. An Expedient Route to<i>F</i>-Alkylated Alkyl and Alkenyl Iodides
A variety of alkenes and alkynes efficiently undergo the perfluoroalkylation with F-alkyl iodides in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium(0) in hexane to give good yields of the corresponding F-alkylated alkyl and alkenyl iodides, respectively.
Copper(I)-Catalyzed Cyanoperfluoroalkylation of Alkynes
作者:Muhammad Israr、Haigen Xiong、Yajun Li、Hongli Bao
DOI:10.1021/acs.orglett.9b02648
日期:2019.9.6
A highly chemoselective and regioselective copper-catalyzed radical cyanoperfluoroalkylation of alkynes is described. This three-component reaction directly uses commercially available alkynes, perfluoroalkyl iodides, and trimethylsilyl cyanide as the reaction partners and delivers a variety of perfluoroalkylated cyanoalkenes in good yields. Broad substrate scope and good functional group tolerance
A Novel Synthesis of 5-Perfluoroalkyl-2,3-dihydro-1,4-diazepines from 1-Perfluoroalkyl-2-iodoethylenes
作者:Jin-Tao Liu、Fu-Lu Zhao
DOI:10.1055/s-2003-41062
日期:——
A novel method for the synthesis of 5-perfluoroalkyl-2,3-dihydro-1,4-diazepines using easily available starting materials is described. 1-Perfluoroalkyl-2-iodoethylenes, obtained from the reaction of perfluoroalkyl iodides and alkynes, reacted with ethylenediamine under mild conditions to give the title compounds in good yields. A possible mechanism is proposed.