An article Selective C3-alkenylation of oxindole with aldehydes using heterogeneous CeO2 catalyst WOS:000531430200008 published article about ENANTIOSELECTIVE CONSTRUCTION; AMIDES; NITRILES; ALCOHOLS; ESTERS; ACTIVATION; HYDRATION; VERSATILE; ISATIN in [Rashed, Md Nurnobi; Touchy, Abeda Sultana; Jeon, Jaewan; Siddiki, S. M. A. Hakim; Toyao, Takashi; Shimizu, Ken-ichi] Hokkaido Univ, Inst Catalysis, N-21,W-10, Sapporo, Hokkaido 0010021, Japan; [Chaudhari, Chandan] Nagoya Univ, Grad Sch Engn, Dept Chem Syst Engn, Nagoya, Aichi 4648603, Japan; [Toyao, Takashi; Shimizu, Ken-ichi] Kyoto Univ, Elements Strategy Initiat Catalysts & Batteries, Kyoto 6158520, Japan in 2020.0, Cited 39.0. The Name is Indolin-2-one. Through research, I have a further understanding and discovery of 59-48-3. Recommanded Product: 59-48-3
We report herein that a commercially available CeO2 is an active and reusable catalyst for the C3-selective alkenylation of oxindole with aldehydes under solvent-free conditions. This. catalytic method is generally applicable to different aromatic and aliphatic aldehydes, giving 3-alkyledene-oxindoles in high yields (87%-99%) and high stereoselectivities (79%-93% to E-isomers). This is the first example of the catalytic synthesis of 3-alkenyl-oxindoles from oxindole and various aliphatic aldehydes. The Lewis acid-base interaction between Lewis acid sites on CeO2 and benzaldehyde was studied by in situ IR. The structure-activity relationship study using CeO2 catalysts with different sizes suggests that defect-free CeO2 surface is the active site for this reaction. (C) 2020, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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