scholarly journals Polyionic polymers – heterogeneous media for metal nanoparticles as catalyst in Suzuki–Miyaura and Heck–Mizoroki reactions under flow conditions

2009 ◽  
Vol 5 ◽  
Author(s):  
Klaas Mennecke ◽  
Andreas Kirschning
Keyword(s):  
Metal Nanoparticles ◽  
Continuous Flow ◽  
Heterogeneous Media ◽  
Flow Reactor ◽  
Functionalized Polymers ◽  
Flow Conditions

The preparation of monolithic polyionic supports which serve as efficient heterogeneous supports for palladium(0) nanoparticles is described. These functionalized polymers were incorporated inside a flow reactor and employed in Suzuki–Miyaura and Heck cross couplings under continuous flow conditions.

Metal- and solvent-free synthesis of aminoalcohols under continuous flow conditions

2020 ◽  
Vol 5 (2) ◽  
pp. 289-299 ◽  
Author(s):  
Abdo-Alslam Alwakwak ◽  
Yingxin He ◽  
Ahmed Almuslem ◽  
Matthew Senter ◽  
Arun K. Itta ◽  
...  
Keyword(s):  
Chemical Transformation ◽  
Hollow Fiber ◽  
Continuous Flow ◽  
Heterogeneous Catalysts ◽  
Flow Reactor ◽  
Solvent Free ◽  
Flow Conditions ◽  
Continuous Flow Reactor ◽  
Solvent Free Synthesis

Multifunctional organocatalysts were immobilized on porous hollow fiber polymer and used as intelligent and cooperative heterogeneous catalysts and continuous flow reactor for sustainable chemical transformation.

scholarly journals Development of an Efficient and Sustainable Synthesis of 2-(3-Methyl-1H-1,2,4-Triazol-1-Yl) Acetic Acid Under Continuous-Flow Conditions

2020 ◽  
Author(s):  
Simone Tortoioli ◽  
Astrid Friedli ◽  
Alice Prud’homme ◽  
Sylvia Richard-Bildstein ◽  
Philipp Kohler ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Continuous Flow ◽  
Flow Reactor ◽  
Environmentally Benign ◽  
Sustainable Construction ◽  
Flow Conditions ◽  
Step Method ◽  
Metal Free ◽  
Free Process ◽  
Synthetic Routes

A novel, metal-free process for the challenging synthesis of 2-(3-methyl-1<i>H</i>-1,2,4-triazol-1-yl) acetic acid (<b>1</b>) is reported, which features an efficient condensation for the triazole build-up under flow conditions. This continuous, two-step method is atom economical, highly selective and environmentally benign, due to the avoidance of chromatography and isolation steps. Compared to the earlier batch synthetic routes, higher yields were achieved in a flow reactor. In addition, a highly energetic intermediate could be controlled and handled in a safe manner. To generalize the established route, several triazoles were finally prepared under the described conditions, confirming that the methodology could find useful applications for the rapid and sustainable construction of differentially functionalized 1,2,4-triazoles.

scholarly journals Safe generation and use of bromine azide under continuous flow conditions – selective 1,2-bromoazidation of olefins

2016 ◽  
Vol 14 (3) ◽  
pp. 853-857 ◽  
Author(s):  
David Cantillo ◽  
Bernhard Gutmann ◽  
C. Oliver Kappe
Keyword(s):  
Continuous Flow ◽  
Flow Reactor ◽  
Flow Conditions ◽  
Continuous Flow Reactor

Hazardous bromine azide (BrN3) can be safely generated and reacted with olefins in a continuous flow reactor under irradiation with light.

An entirely solvent-free photooxygenation of olefins under continuous flow conditions

2020 ◽  
Vol 22 (8) ◽  
pp. 2359-2364 ◽  
Author(s):  
Patrick Bayer ◽  
Axel Jacobi von Wangelin
Keyword(s):  
Singlet Oxygen ◽  
Continuous Flow ◽  
Flow Reactor ◽  
Space Time ◽  
Solvent Free ◽  
Flow Conditions ◽  
High Substrate ◽  
Solvent Free Conditions ◽  
High Space ◽  
Very High

Photooxygenations of alkenes with singlet oxygen have been performed under solvent-free conditions in a flow reactor under VIS irradiation. The reaction operates at very high substrate/sensitizer ratios and enables high space–time yields.

scholarly journals A Novel, Domino Synthesis of Tricyclic Benzimidazole Derivatives Using Continuous Flow

2019 ◽  
Vol 64 (1) ◽  
pp. 1-8
Author(s):  
Balázs Szabó ◽  
Kiara Szakter ◽  
Angelika Thurner ◽  
Ferenc Faigl ◽  
János Éles ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Flow Reactor ◽  
Flow System ◽  
Flow Chemistry ◽  
Benzimidazole Derivatives ◽  
Flow Conditions ◽  
One Pot ◽  
Continuous Flow Reactor ◽  
Novel Method ◽  
The One

A novel method for synthesis of tricyclic benzimidazole derivatives by using continuous flow reactor is reported. Disadvantages of the well-known batch methods have been avoided utilizing the flow chemistry technology. Beside the one pot reductive cyclization using H-Cube Pro®, the dehydration step was also optimized producing the desired lactam compounds. Then the acylation was optimized under microwave conditions and that reaction was also integrated into the flow system using an Asia heater module. This acylation dramatically reduced the reaction time under continuous-flow conditions, with a residence time of 30 min.

scholarly journals Development of an Efficient and Sustainable Synthesis of 2-(3-Methyl-1H-1,2,4-Triazol-1-Yl) Acetic Acid Under Continuous-Flow Conditions

2020 ◽  
Author(s):  
Simone Tortoioli ◽  
Astrid Friedli ◽  
Alice Prud’homme ◽  
Sylvia Richard-Bildstein ◽  
Philipp Kohler ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Continuous Flow ◽  
Flow Reactor ◽  
Environmentally Benign ◽  
Sustainable Construction ◽  
Flow Conditions ◽  
Step Method ◽  
Metal Free ◽  
Free Process ◽  
Synthetic Routes

A novel, metal-free process for the challenging synthesis of 2-(3-methyl-1<i>H</i>-1,2,4-triazol-1-yl) acetic acid (<b>1</b>) is reported, which features an efficient condensation for the triazole build-up under flow conditions. This continuous, two-step method is atom economical, highly selective and environmentally benign, due to the avoidance of chromatography and isolation steps. Compared to the earlier batch synthetic routes, higher yields were achieved in a flow reactor. In addition, a highly energetic intermediate could be controlled and handled in a safe manner. To generalize the established route, several triazoles were finally prepared under the described conditions, confirming that the methodology could find useful applications for the rapid and sustainable construction of differentially functionalized 1,2,4-triazoles.

Renewable Energy from Agricultural Waste

2018 ◽  
Vol 69 (6) ◽  
pp. 1363-1366 ◽  
Author(s):  
Stefania Daniela Bran ◽  
Petre Chipurici ◽  
Mariana Bran ◽  
Alexandru Vlaicu
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Gas Chromatography ◽  
Continuous Flow ◽  
Laboratory Experiments ◽  
Fermentation Process ◽  
Flow Reactor ◽  
Agricultural Waste ◽  
Continuous Flow Reactor ◽  
Natural Support ◽  
Co2 Flow

This paper has aimed at evaluating the concentration of bioethanol obtained using sunflower stem as natural support, molasses as carbon source and Saccharomyces cerevisiae yeast in a continuous flow reactor. The natural support was tested to investigate the immobilization/growth of S. cerevisiae yeast. The concentration of bioethanol produced by fermentation was analyzed by gas chromatography using two methods: aqueous solutions and extraction in organic phase. The CO2 flow obtained during the fermentation process was considered to estimate when the yeast was deactivated. The laboratory experiments have highlighted that the use of plant-based wastes to bioconversion in ethanol could be a non-pollutant and sustainable alternative.

Thermocatalytic Hydrodeoxygenation and Depolymerization of Waste Lignin to Oxygenates and Biofuels in a Continuous Flow Reactor at Atmospheric Pressure

2020 ◽  
Vol 8 (35) ◽  
pp. 13195-13205 ◽  
Author(s):  
Swathi Mukundan ◽  
Daria Boffito ◽  
Abhijit Shrotri ◽  
Luqman Atanda ◽  
Jorge Beltramini ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Continuous Flow ◽  
Flow Reactor ◽  
Continuous Flow Reactor
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