Direct C C coupling of indoles with alkylamides via oxidative C H functionalization using Fe3O(BDC)3 as a productive heterogeneous catalyst
作者:Son H. Doan、Khoa D. Nguyen、Phuc T. Huynh、Tung T. Nguyen、Nam T.S. Phan
DOI:10.1016/j.molcata.2016.07.042
日期:2016.11
used a recyclable heterogeneous catalyst for the direct C C coupling of indoles with alkylamides via oxidative C H functionalization. The catalyst expressed higher catalytic efficiency for the direct C C coupling transformation than that of other MOFs and that of other homogeneous iron catalysts. The coupling of indoles with alkylamides could only continued to form indole derivatives in the presence of
摘要 制备了金属-有机骨架Fe 3 O(BDC) 3 ,并使用可回收的多相催化剂通过氧化CH官能化将吲哚与烷基酰胺直接CC偶联。与其他 MOF 和其他均相铁催化剂相比,该催化剂对直接 CC 偶联转化的催化效率更高。吲哚与烷基酰胺的偶联只能在固体骨架催化剂存在下继续形成吲哚衍生物,如果有的话,提供浸出的活性铁物质是微不足道的。Fe-MOF催化剂可以多次重复用于通过直接CC偶联合成吲哚衍生物,而不会显着降低催化活性。据我们所知,
Iron-Catalyzed Oxidative Coupling of Alkylamides with Arenes through Oxidation of Alkylamides Followed by Friedel−Crafts Alkylation
作者:Eiji Shirakawa、Nanase Uchiyama、Tamio Hayashi
DOI:10.1021/jo102217m
日期:2011.1.7
FeCL(3) in combination with t-BuOOt-Bu as an oxidant was found to be an efficient catalyst for oxidation of alkylamides to alpha-(tert-butoxy)alkylamides. FeCl(2) and CuCl showed, respectively, almost the same and slightly lower activities compared with FeCl(3) in the tert-butoxylation of N-phenylpyrrolidone (1a), whereas no tert-butoxylated product was obtained by use of Fe(OTf)(3), RuCl(3), or Zr(OTf)(4). FeCl(3) was found to be effective also as a catalyst for the Friedel-Crafts alkylation with thus obtained alpha-(tert-butoxy)alkylamides. The Friedel-Crafts alkylation proceeded smoothly also in the presence of a catalytic amount of Fe(OTf)(3), RuCl(3), or Zr(OTf)(4). In contrast, FeCl(2) and CuCl, which showed certain activity toward the tert-butoxylation, failed to promote the Friedel Crafts alkylation. Among the transition metal complexes thus far examined, only FeCl(3) showed high catalytic activities for both the oxidation and the Friedel-Crafts alkylation. The bifunctionality of FeCl(3) was utilized for the oxidative coupling of alkylamides with arenes through a tandem reaction consisting of oxidation of alkylamides to alpha-(tert-butoxy)alkylamides and the following Friedel-Crafts alkylation. The FeCl(3)-catalyzed oxidative coupling is applicable to a wide variety of alkylamides and arenes, though a combination of FeCl(3) with Fe(OTf)(3) was found to be effective for the reaction of arenes with low nucleophilicity. A Fe(II)-Fe(III) catalytic cycle is concerned with the tert-butoxylation, whereas a Fe(III) complex as a Lewis acid catalyzes the Friedel-Crafts alkylation.
Ikeda, Kiyoshi; Morimoto, Toshiaki; Sekiya, Minoru, Chemical and pharmaceutical bulletin, 1980, vol. 28, # 4, p. 1178 - 1182
Novel Preparation of Hemiaminal Derivatives with BPO and <i>N,N</i>
-Dimethylamides and Their Synthetic Use for (Aminomethyl)indoles
作者:Kohei Nakamura、Hideo Togo
DOI:10.1002/ejoc.202000680
日期:2020.8.16
N‐dimethylamides under irradiation or warming condition. By using the hemiaminal derivatives, indoles bearing a (N‐alkyl,N‐methylamino)methyl group could be smoothly obtained by the reduction of the indoles bearing a (N‐acyl,N‐methylamino)methyl group through the Friedel–Crafts alkylation reaction of indoles and the hemiaminal derivatives.
Electrochemical Friedel–Crafts-type amidomethylation of arenes by a novel electrochemical oxidation system using a quasi-divided cell and trialkylammonium tetrafluoroborate
Electrochemical Friedel–Crafts-type amidomethylation was successfully carried out by a novel electrochemical oxidation system using a quasi-divided cell and trialkylammonium tetrafluoroborates, such as iPr2NHEtBF4. Constant current electrolysis of 1,3,5-trimethoxybenzene or indoles in DMA containing 0.1 M iPr2NHEtBF4 using an undivided cell equipped with a Pt plate cathode and a Pt wire anode (a quasi-divided