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Lignin-derived Zn single atom/N-codoped porous carbon forα-alkylation of aromatic ketones with alcohols via borrowing hydrogen strategy

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Nano Research 2022年第3期15卷 1874-1881页

作者： Xueping Zhang Guo-Ping Lu Kun Wang Yamei Lin Pengcheng Wang Wenbin Yi School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyXiaolingwei 200Nanjing 210094China School of Pharmaceutical Sciences Wenzhou Medical CollegeUniversity TownChashanWenzhou 325035China School of Food Science and Pharmaceutical Engineering Nanjing Normal UniversityWenyuanstreet 200Nanjing 210032China

A green and scalable strategy has been developed for the synthesis of lignin-derived Zn single atom/N-codoped porous carbon(LCN@Zn-SAC)containing similar ZnNx sites with carbonic *** catalyst exhibits superior activity on theα-alkylation of ketones with alcohols via borrowing hydrogen strategy(TON up to 15 h^(−1))than most of previously reported *** dehydrogenation of benzyl alcohol is the rate-determining step based on kinetic experiment *** to experimental and theoretical calculation results,Zn electron density is inversely proportional to reaction energy barriers,because Zn sites with less positive charge(ZnN_(4) and ZnN_(3)C)in Zn-SACs display better borrowing hydrogen ability than other Zn ***,this catalyst can be recycled by simple centrifugation,which can be reused at least 8 runs with no obvious lose in *** the best of our knowledge,this is the first example of non-noble metal-SAC-catalyzedα-alkylation via borrowing hydrogen strategy.

关键词： lignin zinc single atom catalyst N-doped porous carbon α-alkylation borrowing hydrogen

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Ruthenium catalyzed amination cyclization of 1,2,4-butanetriol with primary amines:A borrowing hydrogen strategy for 3-pyrrolidinol synthesis

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Chinese Chemical Letters 2020年第1期31卷 103-106页

作者： Qing-Song Xu Chen Li Yong Xu Defeng Xu Mei-Hua Shen Hua-Dong Xu School of Pharmaceutical Engineering & Life Science Changzhou University

A ruthenium based catalytic system([Ru(p-cymene)Cl2]2/XantPhos with substoichiometric Cs2CO3)has been established to effectively achieve the first direct amination cyclization of 1,2,4-butanetriol with primary aromati... 详细信息

关键词： Amination cyclization N-Alkylation 1,2,4-Butanetriol 3-Pyrrolidinol borrowing hydrogen hydrogen autotransfer [Ru(p-cymene)Cl2]2

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Selective C-C bonds formation,N-alkylation and benzo[d]imidazoles synthesis by a recyclable zinc composite

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Chinese Chemical Letters 2022年第1期33卷 266-270页

作者： Guanxin Zhu Zheng-Chao Duan Haiyan Zhu Dongdong Ye Dawei Wang The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510640China School of Chemical and Environmental Engineering Hubei Minzu UniversityEnshi 445000China

Earth abundant metals are much less expensive,promising,valuable metals and could be served as catalysts for the borrowing hydrogen reaction,dehydrogenation and heterocycles synthesis,instead of noble *** uniformly dispersed zinc composites were designed,synthesized and carefully characterized by means of XPS,EDS,TEM and *** resulting zinc composite showed good catalytic activity for the N-alkylation of amines with amines,ketones with alcohols in water under base-free conditions,while unsaturated carbonyl compounds could also be synthesized by tuning the reaction ***,it was the first time to realize the synthesis of 2-aryl-1H-benzo[d]imidazole derivatives by using this zinc composite under green ***,this zinc catalyst could be easily recovered and reused for at least five times.

关键词： Unsymmetrical Zinc borrowing hydrogen Recyclability Selective

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Metal-ligand cooperative iridium complex catalyzed C-alkylation of oxindole and 1,3-dimethylbarbituric acid using alcohols

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Green Synthesis and Catalysis 2023年第3期4卷 246-252页

作者： Ao Song Yunbo Liu Xuan Jin Dianrun Su Zhaopeng Li Shengsheng Yu Lingbao Xing Xiangchao Xu Rongzhou Wang Feng Li School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo255000China School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyNanjing210094China

A general and high-efficiency C-alkylation of oxindoles and barbituric acids has been developed by a Cp*Ir complex[Cp*Ir(2,20-bpyO)(OH)]Na with a bipyridine-based functional *** particular,H_(2)O was selected as the solvent instead of the organic solvent in this catalytic *** mild reaction conditions gave a variety of corresponding alkylated heterocyclic compounds with good to excellent *** importantly,the gramscale C-alkylation reaction was successfully carried out with good yield using a common route with only a single purification by column chromatography.

关键词： C-Alkylation borrowing hydrogen Iridium complex Oxindole 1,3-Dimethylbarbituric acid

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