Reactions of methyl(pentafluorophenyl)- and methyl(pentafluorophenyl)phenylsilanes with electrophiles. A convenient preparative route to halogeno(methyl)pentafluorophenylsilanes C6F5SiMe2X and C6F5SiMeX2 (X=F, Cl and Br)
摘要:
Halogeno(methyl)pentafluorophenylsilanes C6F5SiMenX3-n (n = 1, 2) (X = F, Cl, Br) were prepared in good yields from the corresponding phenylsilanes C6F5SiMenPh3-n by reactions with the electrophiles aHF, HCl-AlCl3, Br-2-AlBr3 or AlX3 (X = Cl, Br) halogenated hydrocarbons. Additionally, reactions of C6F5SiMe3 and (C6F5)(2)SiMe2 with selected electrophiles were studied. (C) 1998 Elsevier Science S.A. All rights reserved.
The organocatalytic synthesis of perfluorophenylsulfides <i>via</i> the thiolation of trimethyl(perfluorophenyl)silanes and thiosulfonates
作者:Jinyun Luo、Muze Lin、Leifang Wu、Zhihua Cai、Lin He、Guangfen Du
DOI:10.1039/d1ob01350e
日期:——
The organic superbase t-Bu-P4-catalyzed direct thiolation of trimethyl(perfluorophenyl)silanes and thiosulfonates was developed. Yields of perfluorophenylsulfides of up to 97% under catalysis of 5 mol% t-Bu-P4 were achieved. This method was shown to provide an efficient way to construct the perfluorophenyl–sulfur bond under mild metal-free reaction conditions.
开发了有机超碱t -Bu-P 4催化的三甲基(全氟苯基)硅烷和硫代磺酸盐的直接硫醇化反应。在 5 mol% t -Bu-P 4的催化下,全氟苯硫醚的产率高达 97% 。该方法被证明提供了一种在温和的无金属反应条件下构建全氟苯基-硫键的有效方法。
N-heterocyclic carbene-catalysed pentafluorophenylation of aldehydes
作者:Guang-Fen Du、Fen Xing、Cheng-Zhi Gu、Bin Dai、Lin He
DOI:10.1039/c5ra05487g
日期:——
N-heterocyclic carbenes have been utilized as highly efficient organocatalysts to catalyse multifluorophenylation of aldehydes with fluorinated aryltrimethylsilanes to afford the corresponding adducts in 49–99% yields.
The reactions of polyfluoroaryl bromides ArFBr or iodides ArFI with P(NR′2)3 and R3MX (R = alkyl; M = Si, Ge, Sn, and Pb; X = Cl, Br) led to the formation of ArFMR3. The reactions of C6F5Br with P(Net2)3 and C-electrophiles (CH3I, C6F5CF3 and (CF3)2C=CFC2F5) gave the products of pentafluorophenylation of these substrates.
polyfluoroaryl的反应溴化物的Ar ˚F Br或碘化物的Ar ˚F我与P(NR' 2)3和R 3 MX(R =烷基; M =硅,锗,锡,和铅; X =氯,溴)导致了Ar F MR 3的形成。C 6 F 5 Br与P(Net 2)3和C-亲电试剂(CH 3 I,C 6 F 5 CF 3和(CF 3)2 C = CFC 2 F 5)的反应产生了五氟苯基化产物基材。