Radical Addition of Perfluoroalkyl Iodides to Alkenes and Alkynes Initiated by Sodium Dithionite in an Aqueous Solution in the Presence of a Novel Fluorosurfactant
fluoroalkylation to occur in the water without adding organic solvent. The addition of perfluoroalkyliodides with olefins and alkynes under the initiation of Na2S2O4 in water in the presence of the fluorosurfactant gave the corresponding adducts in good to excellent yields. The fluorosurfactant was suitable for a radical addition process.
制备并表征了一种新型的氟化阴离子表面活性剂Cl(CF 2)6 O(CF 2)2 SO 3 N(C 2 H 5)4。含氟表面活性剂的应用使氟烷基化在水中发生而无需添加有机溶剂。在含氟表面活性剂的存在下,在水中在Na 2 S 2 O 4的引发下,将全氟烷基碘化物与烯烃和炔烃加成,得到相应的加合物,收率良好或优异。含氟表面活性剂适用于自由基加成过程。
Studies on fluoroalkylation and fluoroalkoxylation. Part 26. Wilkinson's catalyst-induced addition of fluoroalkyl iodides to olefins
作者:Qing-Yun Chen、Zhen-Yu Yang
DOI:10.1016/s0022-1139(00)82777-3
日期:1988.5
Addition of fluoroalkyl iodides to olefins in the presence of tris(triphenylphosphine)chlororhodium (I) in benzene or acetonitrile gives the corresponding 1:1 adducts in good yields. The reaction can be suppressed with p-dinitrobenzene (p-DNB) or di-t-butylnitroxide, and tetrahydrofuran derivatives are obtained from the reaction of fluoroalkyl iodides with diallyl ether. A radical chain-reaction mechanism
Reduction of ω-chloroperfluoroalkyl iodides with lithium aluminium hydride. A single electron tranfer process
作者:Qing-Yun Chen、Ming-Fang Chen
DOI:10.1016/s0022-1139(00)80367-x
日期:1990.7
The reduction of ω-chloroperfluoroalkyl iodides(1a-b) with LiALH4 gave ω-chloroperfluoroalkyl hydride(3) and α,ω-dihydroperfluoroalkane(4). However, in the presence of olefin, the addition product (6) was obtained. The reaction can be partly suppressed by p-dinitrobenzene (p-DNB), and tetrahydrofuran derivatives were obtained from the reaction of ω-chloroperfluoroalkyl iodides with diallyl ether. A
The reaction of polyfluoroalkyl iodides with alkenes or 4-pentenoic acid promoted by sodium bisulfite or sodiumsulfite in DMF aqueous solution was realized. The reaction of alkenes gave corresponding adducts, while γ-lactones were obtained in the case of 4-pentenoic acid in good yields.
Reaction of perfluoroalkyl iodides with alkenes initiated by organophosphine and related compounds
作者:Wei-Yuan Huang、Han-Zhong Zhang
DOI:10.1016/s0022-1139(00)82185-5
日期:1990.10
Perfluoroalkyliodides reacted with alkenes in acetonitrile solution containing catalytic amounts of an organophosphine under mild conditions to give the corresponding adducts in moderate to high yields. Addition of hydroquinone to the reaction mixture suppressed the reaction. Diallyl ether reacted to afford tetrahydrofuran derivatives. These findings indicated that the reaction involved a free radical