6637-11-2Relevant academic research and scientific papers
Switchable regioselection of C-H thiolation of indoles using different TMS counterions
Ji, Yuan-Zhao,Li, Hui-Jing,Zhang, Jin-Yu,Wu, Yan-Chao
supporting information, p. 11864 - 11867 (2019/10/11)
A switchable regioselectivity in C-H thiolation reaction by simply swapping the counteranions of TMS is reported here for the first time. An exclusive C3-H thiolation of indoles with sodium arylsulfinates was achieved in the presence of TMSCl as a promoter. In contrast, with the use of TMSOTf instead of TMSCl under otherwise identical conditions, a regiospecific C2-H thiolation of indoles was realized with the same set of substrates.
Electrooxidation products of methylindoles: Mechanisms and structures
Berlin, Anna,Canavesi, Augusto,Schiavon, Gilberto,Zecchin, Sandro,Zotti, Gianni
, p. 7947 - 7960 (2007/10/03)
Electrochemical oxidation of 1-methylindole, 2-methylindole and 3- methylindole on a platinum anode in acetonitrile containing NaClO4 has been studied. In any case no polymeric deposit on the working electrode was obtained The identification of the obtained soluble products is described and the mechanisms of formation are discussed. Analogously to the case of unsubstituted indole, electrooxidized 1-3 react through positions 2 and 3. The non polymerization of I is explained with the formation of a tetramer which is oxidized to a stable radical cation and dication without undergoing further coupling reactions.
Vilsmeier Formylation and Glyoxylation Reactions of Nucleophilic Aromatic Compounds Using Pyrophosphoryl Chloride
Downie, Ian M.,Earle, Martyn J.,Heaney, Harry,Shuhaibar, Khamis F.
, p. 4015 - 4034 (2007/10/02)
Reactions of N,N-dimethylformamide and N-methylformanilide with pyrophosphoryl chloride lead to the formation of reagents that undergo reactions with a wide range of nucleophilic aromatic substrates, including indoles, pyrroles, thiophenes, furans, and methoxy-substituted carbocyclic arenes to afford, after hydrolysis of the initial products, good to excellent yields of the expected aldehydes; reactions with methyl oxamates allow the preparation of methyl arylglyoxylates. Key words: pyrophosphoryl chloride, N,N-dimethylformamide, methoxyarene, heterocyle, formylation
Bis-trimethylsilylacetamide: A reagent for the control of Friedel-Crafts alkylation reactions using methyl chloromethoxyacetate
Earle, Martyn J.,Fairhurst, Robin A.,Heaney, Harry
, p. 6171 - 6174 (2007/10/02)
The Friedel-Crafts alkylation reactions of electron rich aromatic compounds using methyl α-chloro-α-methoxyacetate and Lewis acids leads predominantly to the formation of diarylacetic acid derivatives in which the second stage of the sequence is favoured by the presence of hydrogen chloride generated in the first step; effective control can be achieved in a number of cases by the addition of bis-trimethylsilylacetamide.
