Nitrogen enriched polytriazine as a metal-free heterogeneous catalyst for the Knoevenagel reaction under mild conditions

2018 ◽  
Vol 42 (15) ◽  
pp. 12924-12928 ◽  
Author(s):  
Monika Chaudhary ◽  
Paritosh Mohanty
Keyword(s):  
Heterogeneous Catalyst ◽  
Knoevenagel Reaction ◽  
Ambient Conditions ◽  
Metal Free ◽  
Mild Conditions

A nitrogen-enriched nanoporous polytriazine was used as a metal-free heterogeneous organocatalyst for high-yielding ultra-fast Knoevenagel reactions under ambient conditions.

Ultrasound accelerated expedient and eco-friendly synthesis of aryl sulfonates using I2 as catalyst at ambient conditions

2021 ◽  
Vol 18 ◽  
Author(s):  
Sha Zhu ◽  
Bin-Bin Wang ◽  
Mei-Chen Tan ◽  
Xiaofu Qian ◽  
Shengneng Ying ◽  
...  
Keyword(s):  
Energy Saving ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Ambient Conditions ◽  
Metal Free ◽  
Mild Conditions ◽  
Efficient Construction ◽  
Ultrasound Assisted

: By using an energy-saving and eco-friendly approach for the efficient construction of aryl sulfonates through ultrasound-assisted coupling reaction of readily sodium sulfinates with N-hydroxyphthalimide was developed under metal-free and mild conditions within 10 min at room temperature.

scholarly journals Co-N-Si/AC Catalyst for Aerobic Oxidation of Benzyl Alcohols to Esters under Mild Conditions

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6792
Author(s):  
Changjian Zhou ◽  
Rong Sun ◽  
Yuting Zhang ◽  
Biao Xiong ◽  
Hui Dai ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Significant Loss ◽  
Ambient Conditions ◽  
Benzyl Alcohols ◽  
Oxidative Esterification ◽  
Product Yields ◽  
Mild Conditions ◽  
Earth Abundant

A stable, earth-abundant, reusable cobalt-based heterogeneous catalyst is developed for the oxidative esterification of alcohols under ambient conditions, featuring broad substrate scope, providing good to excellent product yields. This protocol enables easy recyclability of the catalyst, measured up to five times without significant loss of efficiency. The active sites of Co-N-Si/AC are proposed to be Co-N species.

scholarly journals Pyridine-decorated carbon nanotubes as a metal-free heterogeneous catalyst for mild CO2 reduction to methanol with hydroboranes

2017 ◽  
Vol 7 (24) ◽  
pp. 5833-5837 ◽  
Author(s):  
G. Tuci ◽  
A. Rossin ◽  
L. Luconi ◽  
C. Pham-Huu ◽  
S. Cicchi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Heterogeneous Catalyst ◽  
Co2 Reduction ◽  
Catalytic Performance ◽  
Metal Free ◽  
Mild Conditions ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Pyridine decorated multi-walled carbon nanotubes have been employed as heterogeneous metal-free catalysts for CO2 hydroboration to methyl borinate under mild conditions. Mechanistic insights have unveiled the non-innocent role of the nanotube carrier in the catalytic performance.

A Sequential Ugi-Smiles / Transition-Metal-Free Endo-Dig Conia-ene Cyclization: The Selective Synthesis of Saccharin Substituted 2,5-dihydropyrroles

2021 ◽  
Author(s):  
Hassan Seyrani ◽  
Sorour Ramezanpour ◽  
Aref Vaezghaemi ◽  
Farzad Kobarfard
Keyword(s):  
Transition Metal ◽  
Free Access ◽  
Selective Synthesis ◽  
Metal Free ◽  
Mild Conditions

A convenient, transition-metal-free access to a series of unprecedented saccharin substituted 2,5-dihydropyrroles is reported. This approach employs a post-Ugi-Smiles 5-endo-dig Conia-ene cyclization sequence in mild conditions while incorporating a series...

Metal‐free direct oxidative C–N bond coupling of quinoxalin‐2(1H)‐ones with azoles under mild conditions

2021 ◽  
Author(s):  
Jingwen Guo ◽  
Lina Zhang ◽  
Xinyue Du ◽  
Liting Zhang ◽  
Yuepiao Cai ◽  
...  
Keyword(s):  
Metal Free ◽  
Mild Conditions

A metal-free radical cascade reaction of phosphine oxides with 2-aryloxy phenylacetylenes to assemble diphosphonyl xanthene derivatives

2021 ◽  
Author(s):  
Tao Fan ◽  
Yan Liu ◽  
Caina Jiang ◽  
Yanli Xu ◽  
Yan-Yan Chen
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Cascade Reaction ◽  
Phosphine Oxides ◽  
Metal Free ◽  
Mild Conditions ◽  
Xanthene Derivatives ◽  
Reaction Proceeds ◽  
Radical Cascade

A radical cascade reaction of 2-aryloxy phenylacetylene with phosphine oxides promoted by K2S2O8 was developed, provided diphosphonyl xanthenes as products. This reaction proceeds under transition metal-free and mild conditions with...

scholarly journals An entry to 2-(cyclobut-1-en-1-yl)-1H-indoles through a cyclobutenylation/deprotection cascade

2021 ◽  
Author(s):  
Philipp Natho ◽  
Zeyu Yang ◽  
Lewis Allen ◽  
Juliette Rey ◽  
Andrew J P White ◽  
...  
Keyword(s):  
Transition Metal ◽  
One Pot ◽  
Metal Free ◽  
Mild Conditions

A transition-metal-free strategy for the synthesis of 2-(cyclobut-1-en-1-yl)-1H-indoles under mild conditions is described herein. A series of substituted 2-(cyclobut-1-en-1-yl)-1H-indoles are accessed by a one-pot cyclobutenylation/deprotection cascade from N-Boc protected indoles....

scholarly journals A Metal-Free Synthesis of N-Aryl Carbamates under Ambient Conditions

2015 ◽  
Vol 127 (40) ◽  
pp. 11852-11856 ◽  
Author(s):  
Wusheng Guo ◽  
Joan Gónzalez-Fabra ◽  
Nuno A. G. Bandeira ◽  
Carles Bo ◽  
Arjan W. Kleij
Keyword(s):  
Ambient Conditions ◽  
Metal Free

Metal-Free Synthesis of Highly Substituted Pyridines by Formal [2+2+2] Cycloaddition under Mild Conditions

2016 ◽  
Vol 128 (41) ◽  
pp. 13056-13059 ◽  
Author(s):  
Lan-Gui Xie ◽  
Saad Shaaban ◽  
Xiangyu Chen ◽  
Nuno Maulide
Keyword(s):  
Metal Free ◽  
Mild Conditions ◽  
Substituted Pyridines
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