ChemInform Abstract: Direct Transition-Metal-Free Intramolecular C-O Bond Formation: Synthesis of Benzoxazole Derivatives.

ChemInform ◽  
2011 ◽  
Vol 42 (23) ◽  
pp. no-no
Author(s):  
Jinsong Peng ◽  
Cuijuan Zong ◽  
Min Ye ◽  
Tonghui Chen ◽  
Dewei Gao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Bond Formation ◽  
Direct Transition ◽  
Metal Free

ChemInform Abstract: Direct Transition Metal Free C-S Bond Formation: Synthesis of 2-Aminobenzothiazole Derivatives via Base-Mediated Approach.

ChemInform ◽  
2012 ◽  
Vol 43 (47) ◽  
pp. no-no
Author(s):  
Rui Wang ◽  
Zhi Chen ◽  
Liang Yue ◽  
Wei Pan ◽  
Jun-Jie Zhao
Keyword(s):  
Transition Metal ◽  
Bond Formation ◽  
Direct Transition ◽  
Metal Free

Direct transition metal-free C–S bond formation: synthesis of 2-aminobenzothiazole derivatives via base-mediated approach

2012 ◽  
Vol 53 (34) ◽  
pp. 4529-4531 ◽  
Author(s):  
Rui Wang ◽  
Zhi Chen ◽  
Liang Yue ◽  
Wei Pan ◽  
Jun-Jie Zhao
Keyword(s):  
Transition Metal ◽  
Bond Formation ◽  
Direct Transition ◽  
Metal Free

Transition-metal-free halocarbocyclisation of acrylamides using K2S2O8

2017 ◽  
Vol 41 (6) ◽  
pp. 352-357 ◽  
Author(s):  
Haiwei Ye ◽  
Liping Zhou ◽  
Yunhua Chen ◽  
Jun Qiu
Keyword(s):  
Transition Metal ◽  
Bond Formation ◽  
Direct Transition ◽  
Metal Free ◽  
Novel Strategy

A novel and direct transition-metal-free oxidative halocarbocyclisation of acrylamides using inexpensive KX (X = I, Br, Cl) and K2S2O8 has been developed. This methodology not only provides an efficient way to construct valuable halogenated oxindoles in good to excellent yields, but also represents a novel strategy for C–X and C–C bond formation.

Direct transition-metal-free intramolecular C–O bond formation: synthesis of benzoxazole derivatives

2011 ◽  
Vol 9 (4) ◽  
pp. 1225-1230 ◽  
Author(s):  
Jinsong Peng ◽  
Cuijuan Zong ◽  
Min Ye ◽  
Tonghui Chen ◽  
Dewei Gao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Bond Formation ◽  
Direct Transition ◽  
Metal Free

scholarly journals Metal Free Amino-Oxidation of Electron Rich Alkenes Mediated by an Oxoammonium Salt

2020 ◽  
Author(s):  
Alexandra Millimaci ◽  
Rowan Meador ◽  
Sara Dampf ◽  
John D. Chisholm
Keyword(s):  
Transition Metal ◽  
Solvent Effects ◽  
Free Amino ◽  
Oxidation Products ◽  
Direct Transition ◽  
Metal Free ◽  
Mild Conditions ◽  
Relative Stereochemistry ◽  
Oxoammonium Salt

<div> <div> <div> <p>4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium tetrafluoroborate (Bobbitt’s salt) effectively activates electron rich alkenes and promotes the addition of anilines. This transformation provides a direct, transition metal free method for amino-oxidation of alkenes under mild conditions. The relative stereochemistry of the amino-oxidation is influenced by solvent effects, with both the syn and anti amino-oxidation products being accessible from identical starting materials. </p> </div> </div> </div>

Transition-Metal-Free Catalysis for the Reductive ­Functionalization of CO2 with Amines

Synlett ◽  
2018 ◽  
Vol 29 (05) ◽  
pp. 548-555 ◽  
Author(s):  
Liang-Nian He ◽  
Xiao-Fang Liu ◽  
Xiao-Ya Li ◽  
Chang Qiao
Keyword(s):  
Transition Metal ◽  
Energy Content ◽  
Bond Formation ◽  
Energy Storage Materials ◽  
One Pot ◽  
Metal Free ◽  
Recent Developments ◽  
Electron Reduction ◽  
Reduction Of Co2 ◽  
Hierarchical Reduction

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

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