已知三烷基铵(最显着的是N,N,N-三甲基苯铵)盐通过芳基和N-甲基均显示出双重反应性。因此,这些盐已广泛应用于交叉偶联,芳基醚化,氟放射性标记,相转移催化,超分子识别,聚合物设计和(最近)甲基化。然而,它们作为亲电甲基化试剂的应用仍未得到充分开发,并且缺乏对它们的芳基化与甲基化反应性的了解。本研究提出了N,N,N的机械降解分析。-三甲基苯胺盐,并突出了这一重要类别盐对合成应用的意义。在固相和固溶阶段的动力学降解研究已经深入了解了影响苯胺盐稳定性的物理和化学参数。盐降解的1 H NMR动力学分析表明,热降解为甲基碘和母体苯胺,与闭壳S N一致2位降解途径,而甲基碘是应用甲基化程序中的关键反应物种。此外,还研究了卤化物和非亲核抗衡离子对盐降解的影响,以及氘同位素和溶剂的影响。新的力学见解使人们能够研究三甲基苯胺盐在O-甲基化中的应用以及在改进的交叉偶联策略中的应用。最后,详细的计算研究有助于
作者:Alicia B. Chopa、María T. Lockhart、Gustavo Silbestri
DOI:10.1021/om000859p
日期:2001.7.1
Arylamines have been converted into aryltrimethylammonium salts, which on reaction with sodium trimethylstannide (1) in liquid ammonia afford aryltrimethylstannanes by the SRN1 mechanism. With (4-methoxyphenyl)- (2), (1-naphthyl)- (4), phenyl- (6), (4-acetylphenyl)- (8), and (4-cyanophenyl)trimethylammonium salts (10) the substitution products are obtained in good to excellent yields (45−100%). Also
Nickel-Catalyzed Cross-Coupling of Aryltrimethylammonium Iodides with Organozinc Reagents
作者:Lan-Gui Xie、Zhong-Xia Wang
DOI:10.1002/anie.201100683
日期:2011.5.16
Broad scope and good tolerance: An efficient cross‐coupling of aryltrimethylammonium iodide salts with aryl‐, methyl‐, and benzylzinc chlorides catalyzed by [Ni(PCy3)2Cl2] has been achieved (see scheme). The reaction involves cleavage of the CN bond and displays broad substrate scope and good functional group tolerance. NMP=N‐methylpyrrolidine.
Gavrilov, V. I.; Khusnutdinova, F. M., Journal of general chemistry of the USSR, 1987, vol. 57, p. 295 - 297
作者:Gavrilov, V. I.、Khusnutdinova, F. M.
DOI:——
日期:——
Kokorev, G. I.; Yambushev, F. D.; Badrutdinov, Sh. Kh., Journal of general chemistry of the USSR, 1987, vol. 57, p. 762 - 764
作者:Kokorev, G. I.、Yambushev, F. D.、Badrutdinov, Sh. Kh.
DOI:——
日期:——
Electrosynthesis of Unsymmetrical Polyaryls by a SRN1-Type Reaction
作者:P. Boy、C. Combellas、C. Suba、A. Thiebault
DOI:10.1021/jo00095a024
日期:1994.8
Unsymmetrical polyaryls are electrosynthesized in liquid ammonia by a single-step S(RN)1 reaction in the presence of a redox mediator starting from aromatic halides and 2,6-di-tert-butyl phenoxide. With monoaryl halides activated by electron-withdrawing substituents (N of pyridyl or quinolyl, trifluoromethyl, cyano, sulfone, ester, ketone, alkyl sulfide, N+ of anilinium), biaryls are obtained in good yields (between 50 and 95%). The yields of ter- and quateraryls are lower (40% maximum). The reaction is extended to other ortho-disubstituted phenols. Elimination reactions of the tert-butyl groups from the products are achieved by a Friedel-Crafts reaction using either trifluoromethanesulfonic acid or aluminum trichloride as catalysts.