One-Pot Synthesis of Indoles and Aniline Derivatives from Nitroarenes under Hydrogenation Condition with Supported Gold Nanoparticles
摘要:
One-pot sequences of hydrogenation/hydroamination to form Indoles from (2-nitroaryl)alkynes and hydrogenation/reductive amination to form aniline derivatives from nitroarenes and aldehydes were catalyzed by Au nanoparticles supported on Fe2O3. Nitro group selective hydrogenations and successive reactions were efficiently catalyzed under the conditions.
Copper(0)/PPh<sub>3</sub>-Mediated Bisheteroannulations of <i>o</i>-Nitroalkynes with Methylketoximes Accessing Pyrazo-Fused Pseudoindoxyls
作者:Huanxin Meng、Zhenhua Xu、Zhonghua Qu、Huawen Huang、Guo-Jun Deng
DOI:10.1021/acs.orglett.0c02180
日期:2020.8.7
A copper(0)/PPh3-mediated cascade bisheteroannulation reaction of o-nitroalkynes with methylketoximes has been developed that provides viable access to a diverse range of pyrazo-fused pseudoindoxyl compounds. Synthetically useful functional groups including sensitive C–I bonds are compatible with this system. Mechanistic studies suggest a reaction cascade involving sequential PPh3-mediated deoxygenative
Catalytic asymmetric formal [3+2] cycloaddition of isatogens with azlactones to construct indolin-3-one derivatives
作者:Lihua Xie、Yi Li、Shunxi Dong、Xiaoming Feng、Xiaohua Liu
DOI:10.1039/d0cc06418a
日期:——
A number of enantioenriched indolin-3-one derivatives were readily obtained by chiral guanidine-catalyzed [3+2] cycloaddition of isatogens with azlactones.
One-Pot Synthesis of Indole Derivatives from the Reaction of Nitroalkynes and Alkynes via a Mercury-Carbene Intermediate
作者:Shifa Zhu、Min Zheng、Kai Chen
DOI:10.1055/s-0036-1588416
日期:2017.9
Published as part of the Special Topic Modern Cyclization Strategies in Synthesis Abstract The cyclization of nitroalkyne catalyzed by Hg(OTf)2 to produce the corresponding benzo[c]isoxazole in excellent yields with high selectivity is reported. On the basis of this strategy, a one-pot method to synthesize indolederivatives has been developed. In this transformation, two Hg-carbene intermediates are
作为专题“现代合成中的环化策略”的一部分发布 抽象的 据报道,Hg(OTf)2催化硝基炔的环化反应,以高收率和高选择性产生相应的苯并[ c ]异恶唑。在这种策略的基础上,开发了一种一锅合成吲哚衍生物的方法。在该转化中,提出了涉及两个Hg-卡宾中间体。 据报道,Hg(OTf)2催化硝基炔的环化反应,以高收率和高选择性产生相应的苯并[ c ]异恶唑。在这种策略的基础上,开发了一种一锅合成吲哚衍生物的方法。在该转化中,提出了涉及两个Hg-卡宾中间体。
Synthesis of
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‐Hydroxyindole Derivatives via Pd‐Catalyzed Electrophilic Cyclization
作者:Soo Min Oh、Seunghoon Shin
DOI:10.1002/bkcs.12285
日期:2021.6
A synthetic protocol for the synthesis of C2-substituted N-hydroxyindoles has been developed which consists of Sonogashira coupling, partial reduction of the nitro group, and Larock cyclization. This protocol features superior generality and efficiency over conventional alternatives.
An efficient protocol for the synthesis of internal aryl alkynes was achieved via Cu-catalyzed decarboxylativecross-coupling reactions, and to the best of our knowledge, this is the first example of a Cu-catalyzed decarboxylative alkynylation of benzoic acids with terminal alkynes. This approach utilizes simple Cu salt as catalyst and O2, an abundant, clean, and green material, as the oxidant. The