Metal-Free CN- and NN-Bond Formation: Synthesis of 1,2,3-Triazoles from Ketones,N-Tosylhydrazines, and Amines in One Pot

2014 ◽  
Vol 20 (52) ◽  
pp. 17635-17639 ◽  
Author(s):  
Zhengkai Chen ◽  
Qiangqiang Yan ◽  
Zhanxiang Liu ◽  
Yuhong Zhang
Keyword(s):  
One Pot ◽  
Synlett ◽  
2018 ◽  
Vol 29 (05) ◽  
pp. 548-555 ◽  
Author(s):  
Liang-Nian He ◽  
Xiao-Fang Liu ◽  
Xiao-Ya Li ◽  
Chang Qiao

Reductive functionalization of CO2 with amines and a reductant, which combines both reduction of CO2 and C–N bond formation in one pot to produce versatile chemicals and energy-storage materials such as formamides, aminals, and methylamines that are usually derived from petroleum feedstock, would be appealing and promising. Herein, we give a brief review on recent developments in the titled CO2 chemistry by employing transition-metal-free catalysis, which can be catalogued as below according to the diversified energy content of the products, that is formamides, aminals, and methylamines being consistent with 2-, 4-, and 6-electron reduction of CO2, respectively. Notably, hierarchical reduction of CO2 with amines to afford at least two products, for example, formamides and methylamines, could be realized with the same catalyst through tuning the hydrosilane type, reaction temperature, or CO2 pressure. Finally, the opportunities and challenges of the reductive functionalization of CO2 with amines are also highlighted.1 Introduction2 2-Electron Reduction of CO2 to Formamide3 6-Electron Reduction of CO2 to Methylamine4 4-Electron Reduction of CO2 to Aminal5 Hierarchical Reduction of CO2 with Amines6 Conclusion


RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 39563-39567 ◽  
Author(s):  
Pengfeng Guo ◽  
Changcheng Wang ◽  
Ya Chen ◽  
Caijun Ou ◽  
Hangqi Jiang ◽  
...  

A novel one pot, metal-free, three-component domino reaction for the formation of furan derivatives has been developed from 3-phenylpropiolaldehyde, 1,3-dicarbonyl compounds and aromatic amine or aliphatic acid.


ChemInform ◽  
2015 ◽  
Vol 46 (48) ◽  
pp. no-no
Author(s):  
Xianhai Tian ◽  
Lina Song ◽  
Ertong Li ◽  
Qiang Wang ◽  
Wenquan Yu ◽  
...  

ChemInform ◽  
2015 ◽  
Vol 46 (21) ◽  
pp. no-no
Author(s):  
Zhengkai Chen ◽  
Qiangqiang Yan ◽  
Zhanxiang Liu ◽  
Yuhong Zhang
Keyword(s):  
One Pot ◽  

Synthesis ◽  
2018 ◽  
Vol 50 (12) ◽  
pp. 2385-2393 ◽  
Author(s):  
Qiu Sun ◽  
Ling He ◽  
Jiaxin Cheng ◽  
Ze Yang ◽  
Yuansheng Li ◽  
...  

A novel, one-pot reaction for the synthesis of isoxazolines and isoxazoles is developed via a cascade process under metal-free conditions. The approach involves the formation of intramolecular C–N and C–O bonds and intermolecular C–C bonds from aromatic alkenes or alkynes and N-hydroxysulfonamides using hypervalent iodine(VII) and iodine as the oxidant. Activation of C–H and C–C bonds/construction of C–O bonds/elimination of SO2/C–N bond formation is achieved in sequence­ in the reaction system.


2015 ◽  
Vol 13 (29) ◽  
pp. 7973-7978 ◽  
Author(s):  
Vunnam Venkateswarlu ◽  
K. A. Aravinda Kumar ◽  
Sorav Gupta ◽  
Deepika Singh ◽  
Ram A. Vishwakarma ◽  
...  

One-pot I2/DMSO mediated metal-free C–C bond cleavage of aryl-/heteroaryl- or aliphatic α-ketoaldehydes offering a carboxylic acid followed by esterification is presented.


RSC Advances ◽  
2015 ◽  
Vol 5 (76) ◽  
pp. 62194-62201 ◽  
Author(s):  
Xianhai Tian ◽  
Lina Song ◽  
Ertong Li ◽  
Qiang Wang ◽  
Wenquan Yu ◽  
...  

A variety of 1,3-diazaheterocyclic compounds, including quinazolinones, benzimidazoles, and cyclic amidines, were readily synthesized through this metal-free one-pot annulation reaction.


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