scholarly journals Synthesis in mesoreactors: Ru(porphyrin)CO-catalyzed aziridination of olefins under continuous flow conditions

2016 ◽  
Vol 6 (13) ◽  
pp. 4700-4704 ◽  
Author(s):  
S. Rossi ◽  
A. Puglisi ◽  
M. Benaglia ◽  
D. M. Carminati ◽  
D. Intrieri ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Flow Conditions ◽  
Aryl Azides ◽  
First Time

The Ru(porphyrin)CO-catalyzed addition of aryl azides to styrenes to afford N-aryl aziridines was successfully performed for the first time in mesoreactors under continuous flow conditions.

Highly Enantioselective Immobilized Prolinamide-Catalyzed Aldol Reactions in Continuous-Flow Systems: Effect of Water on Catalyst Lifetime and Application to the Synthesis of a Chiral Fenpentadiol Analogue

2021 ◽  
Author(s):  
Caizhen Yue ◽  
Yasuhiro Yamashita ◽  
Shu Kobayashi
Keyword(s):  
Continuous Flow ◽  
Flow System ◽  
Aldol Reactions ◽  
Flow Conditions ◽  
Effect Of Water ◽  
Flow Systems ◽  
First Time ◽  
Catalyst Lifetime

Catalytic enantioselective aldol reactions of trifluoroacetophenones with ketones under continuous-flow conditions have been developed for the first time by using polystyrene-supported prolinamides. The robustness of the flow system was demonstrated...

scholarly journals Continuous-flow synthesis of primary amines: Metal-free reduction of aliphatic and aromatic nitro derivatives with trichlorosilane

2016 ◽  
Vol 12 ◽  
pp. 2614-2619 ◽  
Author(s):  
Riccardo Porta ◽  
Alessandra Puglisi ◽  
Giacomo Colombo ◽  
Sergio Rossi ◽  
Maurizio Benaglia
Keyword(s):  
Continuous Flow ◽  
Reaction Times ◽  
Nitro Compounds ◽  
Primary Amines ◽  
Flow Conditions ◽  
Metal Free ◽  
Nitro Derivatives ◽  
Aromatic Nitro ◽  
High Yields ◽  
First Time

The metal-free reduction of nitro compounds to amines mediated by trichlorosilane was successfully performed for the first time under continuous-flow conditions. Aromatic as well as aliphatic nitro derivatives were converted to the corresponding primary amines in high yields and very short reaction times with no need for purification. The methodology was also extended to the synthesis of two synthetically relevant intermediates (precursors of baclofen and boscalid).

Metal–organic frameworks for the removal of the emerging contaminant atenolol under real conditions

2021 ◽  
Vol 50 (7) ◽  
pp. 2493-2500
Author(s):  
Sara Rojas ◽  
Jorge A. R. Navarro ◽  
Patricia Horcajada
Keyword(s):  
Continuous Flow ◽  
Metal Organic Frameworks ◽  
Fixed Bed ◽  
Emerging Contaminant ◽  
Flow Conditions ◽  
Metal Organic ◽  
Fixed Bed System

A defective Metal-Organic Frameworks as an improved material for the construction of a fixed-bed system working under continuous flow conditions for the removal of the emerging contaminant atenolol.

scholarly journals Formation and Utility of Reactive Ketene Intermediates Under Continuous Flow Conditions

Tetrahedron ◽  
2021 ◽  
pp. 132305
Author(s):  
Harry R. Smallman ◽  
Jamie A. Leitch ◽  
Tom McBride ◽  
Steven V. Ley ◽  
Duncan L. Browne
Keyword(s):  
Continuous Flow ◽  
Flow Conditions

scholarly journals Achieving selectivity in porphyrin bromination through a DoE-driven optimization under continuous flow conditions

2020 ◽  
Author(s):  
Paolo Zardi ◽  
Michele Maggini ◽  
Tommaso Carofiglio
Keyword(s):  
Reaction Time ◽  
Design Of Experiment ◽  
Continuous Flow ◽  
Optimization Process ◽  
Porphyrin Ring ◽  
Flow Conditions ◽  
Reaction Parameters ◽  
Synthetic Procedure ◽  
Relevant Factors ◽  
Post Functionalization

AbstractThe post-functionalization of porphyrins through the bromination in β position of the pyrrolic rings is a relevant transformation because the resulting bromoderivatives are useful synthons to covalently link a variety of chemical architectures to a porphyrin ring. However, single bromination of porphyrins is a challenging reaction for the abundancy of reactive β-pyrrolic positions in the aromatic macrocycle. We herein report a synthetic procedure for the efficient preparation of 2-bromo-5,10,15,20-tetraphenylporphyrin (1) under continuous flow conditions. The use of flow technology allows to reach an accurate control over critical reaction parameters such as temperature and reaction time. Furthermore, by performing the optimization process through a statistical DoE (Design of Experiment) approach, these parameters could be properly adjusted with a limited number of experiments. This process led us to a better understanding of the relevant factors that govern porphyrins monobromination and to obtain compound 1 with an unprecedent 80% yield.

Microwave-Assisted Grafting to MCM-41 Silica and its Application as Catalyst in Flow Chemistry

2011 ◽  
Vol 64 (11) ◽  
pp. 1522 ◽  
Author(s):  
Manuela Oliverio ◽  
Antonio Procopio ◽  
Toma N. Glasnov ◽  
Walter Goessler ◽  
C. Oliver Kappe
Keyword(s):  
Continuous Flow ◽  
Rate Increase ◽  
Flow Chemistry ◽  
Conventional Heating ◽  
Kinetic Effect ◽  
Microwave Technology ◽  
Microwave Assisted ◽  
Technology Control ◽  
First Time ◽  
Mcm 41

Finding environmentally gentle methods to graft Lewis acid on the surface of mesoporous materials is a topic of current interest. Herein we describe the optimization of a preparation procedure of a mesoporous silica-supported ErIII catalyst using the microwave-assisted post-calcination functionalization of Mobil Composition of Matter-41 silica as the key step. The required time for functionalization was reduced from several hours to 10 min using sealed-vessel microwave technology. Control experiments using conventional heating at the same temperature demonstrated that the rate increase is owing to a simple thermal/kinetic effect as a result of the higher reaction temperature. The resulting ErIII catalyst was tested for the first time as a catalyst in the continuous flow deprotection of benzaldehyde dimethylacetal and a complete leaching study was performed.

Ammonium formate as a green hydrogen source for clean semi-continuous enzymatic dynamic kinetic resolution of (+/−)-α-methylbenzylamine

RSC Advances ◽  
2014 ◽  
Vol 4 (26) ◽  
pp. 13620-13625 ◽  
Author(s):  
Amanda S. de Miranda ◽  
Rodrigo O. M. A. de Souza ◽  
Leandro S. M. Miranda
Keyword(s):  
Continuous Flow ◽  
Kinetic Resolution ◽  
Ammonium Formate ◽  
Flow Conditions ◽  
Dynamic Kinetic Resolution

The chemoenzymatic dynamic kinetic resolution of (+/−)-α-methylbenzylamine under continuous flow conditions in the presence of Pd/BaSO4as racemization catalyst and ammonium formate as reductant is described.

scholarly journals Size Selective Synthesis of Superparamagnetic Nanoparticles in Thin Fluids under Continuous Flow Conditions

2008 ◽  
Vol 18 (6) ◽  
pp. 922-927 ◽  
Author(s):  
Suk Fun Chin ◽  
K. Swaminathan Iyer ◽  
Colin L. Raston ◽  
Martin Saunders
Keyword(s):  
Continuous Flow ◽  
Superparamagnetic Nanoparticles ◽  
Selective Synthesis ◽  
Flow Conditions
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