Here, we explore the GO‐catalyzed cross‐dehydrogenativecoupling of oxindoles with arenes and thiophenols for the rapid synthesis of 3‐aryloxindoles and 3‐sulfenylated oxindoles. Control experiments and small‐molecule mimicking studies reveal that the acidic nature and quinone‐type functionalities of GO are synergistically utilized for the coupling reaction. The reaction proceeds under simple and mild
Synthesis of 3-substituted 2-oxindoles from secondary α-bromo-propionanilides <i>via</i> palladium-catalyzed intramolecular cyclization
作者:Hui Shen、Yu Du、Jian Kan、Weiping Su
DOI:10.1039/d2ob00480a
日期:——
aromatic halides, coupling reactions involving oxidative addition of alkyl halides, especially secondary or tertiary halides, to transition metals tend to be more challenging. Herein a palladium-catalyzedintramolecularcyclization of α-bromo-propionanilides has been developed, delivering a series of 3-substituted 2-oxindoles in high yields. The method features easy to prepare starting materials, broad substrate
A simple and eco-friendly method for the aminomethylation of 3-substituted oxindoles via three-component Mannich reaction in aqueous media
作者:Xiong-Li Liu、Xiao-Mei Zhang、Wei-Cheng Yuan
DOI:10.1016/j.tetlet.2010.12.060
日期:2011.2
A simple and eco-friendly method for the aminomethylation of various 3-substituted oxindoles via three-component Mannich reaction in aqueous media has been established. A variety of oxindoles containing a quaternary carbon center, which comprises an aminomethyl group were obtained smoothly in good yields (up to 93%) with this method. Particularly valuable features, such as employing cheap and readily available formalin as a useful aminomethylation Cl unit and using water as a reaction medium, are embodied in this method. (C) 2010 Elsevier Ltd. All rights reserved.
A highly efficient and eco-friendly method for the synthesis of 1,3-indandione ring-fused 3-oxindoles bearing two contiguous quaternary stereocenters via an aldol reaction in aqueous media
method for the synthesis of oxindoles featuring two contiguous quaternary carbon centers via an aldol reaction starting from various 3-substituted oxindoles has been established. A wide variety of such featured multi-substituted 1,3-indandione ring-fused 3-oxindole scaffolds were obtained smoothly in good yields (up to 98%) employing the most green of solvents, namely water, as reaction medium. Furthermore
Palladium-Catalyzed Allylation of Cyclopropyl Acetylenes with Oxindoles to Construct 1,3-Dienes
作者:Chuan-Jun Lu、Xin Yu、Yu-Ting Chen、Qing-Bao Song、Zhen-Ping Yang、Hong Wang
DOI:10.1002/ejoc.201901536
日期:2020.2.14
A novel palladium‐catalyzed allylic alkylation of oxindoles with cyclopropylacetylenes has been developed. Various 1,3‐diene oxindole framework bearing a quaternary stereocenter at the C3 position were synthesized straightforwardly in good to excellent yields with high regio‐, and stereoselectivities.