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Gujral J, Reddy TP, Gorachand B, Ramachary DB. An Aldehyde‐Azomethine Imine [3+2]‐Cycloaddition: High‐Yielding Regioselective Synthesis of Substituted
N,N
‐Bicyclic Pyrazolidinones. ChemistrySelect 2018. [DOI: 10.1002/slct.201801328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jagjeet Gujral
- Catalysis LaboratorySchool of ChemistryUniversity of Hyderabad Hyderabad-500 046 India
| | - T. Prabhakar Reddy
- Catalysis LaboratorySchool of ChemistryUniversity of Hyderabad Hyderabad-500 046 India
| | - B. Gorachand
- Catalysis LaboratorySchool of ChemistryUniversity of Hyderabad Hyderabad-500 046 India
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Zhou Z, Peng X, Zhong L, Li X, Sun R. Lignin Nanosphere-Supported Cuprous Oxide as an Efficient Catalyst for Huisgen [3+2] Cycloadditions under Relatively Mild Conditions. Polymers (Basel) 2018; 10:E724. [PMID: 30960649 PMCID: PMC6403750 DOI: 10.3390/polym10070724] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/11/2018] [Accepted: 06/13/2018] [Indexed: 01/01/2023] Open
Abstract
In this work, low-cost lignin nanospheres were fabricated and further applied as an efficient and sustainable support for preparing cuprous oxide (Cu₂O) "green" catalyst by using electrospraying technology. The unalloyed lignin, a special three-dimensional molecular structure, was successfully processed into uniform nanospheres under an electrospraying condition. The synthesized lignin-supported Cu₂O catalyst had a well-defined nanosphere structure, and Cu₂O nanoparticles with sizes less than 30 nm were supported by exposed layers of lignin nanospheres. There were C⁻O⁻Cu bonds formed between the lignin nanospheres and the metallic nanoparticles. The lignin nanospheres and the lignin nanosphere-supported catalyst werfe characterized by utilizing XRD, SEM, TEM, XPS, EDS, and TGA. The immobilization of Cu₂O nanoparticles on the lignin nanospheres was beneficial for dispersion of the Cu₂O nanoparticles and preventing their aggregation, which could cause catalyst deactivation, which favored the Huisgen [3+2] cycloaddition reaction. The triazole synthesis results indicated that the lignin nanosphere-supported Cu₂O catalyst had a high catalytic performance with 99% yield under solvent-free conditions. Furthermore, the as-synthesized catalyst could be recycled for four times without significantly losing its catalytic activity.
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Affiliation(s)
- Zidan Zhou
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Xinwen Peng
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Linxin Zhong
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Xuehui Li
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Runcang Sun
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
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Grošelj U, Svete J, Al Mamari HH, Požgan F, Štefane B. Metal-catalyzed [3+2] cycloadditions of azomethine imines. Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2258-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Affiliation(s)
- Davin Tan
- Department of Chemistry; McGill University; 801 Sherbrooke St.W. H3A0B8 Montreal Canada
| | - Tomislav Friščić
- Department of Chemistry; McGill University; 801 Sherbrooke St.W. H3A0B8 Montreal Canada
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Zhang M, Wu F, Wang H, Wu J, Chen W. Copper-Catalyzed Sequential Azomethine Imine-Alkyne Cycloaddition and Umpolung Thiolation Reactions. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700387] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Min Zhang
- Department of Chemistry; Zhejiang University; Hangzhou 310028 People's Republic of China
| | - Feifei Wu
- Department of Chemistry; Zhejiang University; Hangzhou 310028 People's Republic of China
| | - Huanhong Wang
- Department of Chemistry; Zhejiang University; Hangzhou 310028 People's Republic of China
| | - Junshi Wu
- Department of Chemistry; Zhejiang University; Hangzhou 310028 People's Republic of China
- Present address: Institute of Chemical Technology; Shandong Academy of Sciences; Jinan People's Republic of China
| | - Wanzhi Chen
- Department of Chemistry; Zhejiang University; Hangzhou 310028 People's Republic of China
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Zhao HW, Li B, Pang HL, Tian T, Chen XQ, Song XQ, Meng W, Yang Z, Zhao YD, Liu YY. Diastereoselective 1,3-Dipolar Cycloadditions of N,N'-Cyclic Azomethine Imines with Iminooxindoles for Access to Oxindole Spiro-N,N-bicyclic Heterocycles. Org Lett 2016; 18:848-51. [PMID: 26853121 DOI: 10.1021/acs.orglett.6b00139] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the presence of CuI, 1,3-dipolar cycloadditions of N,N'-cyclic azomethine imines with iminooxindoles proceeded readily and furnished novel oxindole spiro-N,N-bicyclic heterocycles in moderate to excellent chemical yields with excellent diastereoselectivities.
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Affiliation(s)
- Hong-Wu Zhao
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Bo Li
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Hai-Liang Pang
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Ting Tian
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Xiao-Qin Chen
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Xiu-Qing Song
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Wei Meng
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Zhao Yang
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Yu-Di Zhao
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Yue-Yang Liu
- College of Life Science and Bio-engineering, Beijing University of Technology , No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
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