95-20-5Relevant articles and documents
Gold nanoparticles catalyst with redox-active poly(aniline sulfonic acid): Application in aerobic dehydrogenative oxidation of cyclic amines in aqueous solution
Amaya, Toru,Ito, Tsubasa,Inada, Yuhi,Saio, Daisuke,Hirao, Toshikazu
, p. 6144 - 6147,4 (2012)
The catalysis of poly(2-methoxyaniline-5-sulfonic acid) (PMAS)/gold nanoparticles catalyst was demonstrated for the dehydrogenative oxidation reaction of 2-substituted indoline and dihydropyridine under molecular oxygen in aqueous solution. This catalyst was recyclable. Redox mediating function of PMAS was revealed by following the UV-vis spectra.
Nickel-Catalyzed Asymmetric Reductive Heck Cyclization of Aryl Halides to Afford Indolines
Qin, Xurong,Lee, Marcus Wen Yao,Zhou, Jianrong Steve
, p. 12723 - 12726 (2017)
A nickel-catalyzed asymmetric reductive Heck reaction of aryl chlorides has been developed that affords substituted indolines with high enantioselectivity. Manganese powder is used as the terminal reductant with water as a proton source. Mechanistically, it is distinct from the palladium-catalyzed process in that the nickel–carbon bond is converted into a C?H bond to release the product through protonation instead of hydride donation followed by C?H reductive elimination on Pd.
Sterically Controlled Ru(II)-Catalyzed Divergent Synthesis of 2-Methylindoles and Indolines through a C-H Allylation/Cyclization Cascade
Manna, Manash Kumar,Bairy, Gurupada,Jana, Ranjan
, p. 8390 - 8400 (2018)
A ruthenium-catalyzed synthesis of 2-methylindole was accomplished via a C-H allylation/oxidative cyclization cascade. Strategically, β-hydride elimination from the σ-alkyl-Ru intermediate has been suppressed by steric hindrance from a remote position. Hence, 2-methylindolines from the corresponding ortho-substituted anilines were achieved via protodemetalation in lieu of β-hydride elimination under a modified reaction condition. This mild intermolecular annulation cascade proceeds smoothly by a redox-neutral ruthenium catalyst without stoichiometric metal oxidants, such as silver(I) or copper(II) salts, providing excellent functional group tolerance.
Homogeneously-catalysed hydrogen release/storage using the 2-methylindole/2-methylindoline LOHC system in molten salt-organic biphasic reaction systems
S?gaard, Alexander,Scheuermeyer, Marlene,B?smann, Andreas,Wasserscheid, Peter,Riisager, Anders
, p. 2046 - 2049 (2019)
Ir-Complex catalysed hydrogen release/storage using a 2-methylindole/2-methylindoline Liquid Organic Hydrogen Carrier (LOHC) system is shown to be effective in a temperature range of 120 to 140 °C. In the form of a liquid-liquid biphasic reaction system with molten [PPh4][NTf2] as catalyst immobilisation phase, the applied cationic Ir-complex can be easily separated and recycled enabling a small amount of ionic catalyst solution to store/release a large amount of hydrogen.
Asymmetric transfer hydrogenation of heterocycle-containing acetophenone derivatives using N-functionalised [(benzene)Ru(II)(TsDPEN)] complexes
Barrios-Rivera, Jonathan,Xu, Yingjian,Clarkson, Guy J.,Wills, Martin
supporting information, (2021/12/02)
The application of enantiomerically-pure ruthenium(II) catalysts containing N - functionalised TsDPEN ligand to the asymmetric transfer hydrogenation of 15 examples of α-heterocyclic acetophenone derivatives is reported. Products of up to 99% ee were formed.
Synthesis of indoles through acceptorless dehydrogenative coupling catalyzed by nickel on silica-alumina
Charvieux, Aubin,Hammoud, Abdul Aziz,Duclos, Marie-Christine,Duguet, Nicolas,Métay, Estelle
supporting information, (2021/07/25)
The high atom-economical formation of indoles from anilines and diols was described with affordable and easy to handle Ni/SiO2-Al2O3. After optimization, 2,3-dimethylindole was isolated with an excellent 98% yield in neat conditions. The scope of the reaction was studied and 13 indoles were isolated in 16–80% yields.
Method for synthesizing 2-substituted indole derivative under catalysis of copper
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Paragraph 0023-0026, (2021/09/11)
The invention relates to a method for synthesizing a 2-substituted indole derivative under the catalysis of copper, which comprises the following step of: reacting by taking copper acetylacetonate (Cu (acac) 2) as a catalyst and taking indole and halogenated hydrocarbon as raw materials to obtain the 2-substituted indole derivative. Compared with the prior art, the method has the advantages that the copper acetylacetonate Cu (acac) 2 which is low in price, easy to obtain and stable in property is used as the catalyst, the method is green and economical, the catalyst is used for catalyzing the indole and halogenated hydrocarbon to react to synthesize the 2-substituted indole derivative, the reaction condition is mild, and the selectivity and yield of the product are high; and the synthesis method is simple and green, the 2-substituted indole derivative is directly constructed by using cheap and easily available raw materials indole and halogenated hydrocarbon, and the 2-substituted indole derivative has good substrate universality and has wide application value in the fields of pharmaceutical chemistry, fine chemical industry and the like.