One-Pot Hydroacetylation of Menadione (Vitamin K3) to Menadiol Diacetate (Vitamin K4) by Heterogeneous Catalysis

2012 ◽  
Vol 354 (7) ◽  
pp. 1301-1306 ◽  
Author(s):  
Claudiu Dobrinescu ◽  
Elena E. Iorgulescu ◽  
Constantin Mihailciuc ◽  
Dan Macovei ◽  
Stefan Wuttke ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Vitamin K3 ◽  
One Pot

scholarly journals Controlling Product Selectivity with Nanoparticle Composition in Tandem Chemo-Biocatalytic Styrene Oxidation

2021 ◽  
Author(s):  
Derik Wilbers ◽  
Joseph Brehm ◽  
Richard Lewis ◽  
Jacqueline Van Marwijk ◽  
Thomas Davies ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Product Selectivity ◽  
Styrene Oxidation ◽  
One Pot ◽  
Potential Approach ◽  
Reaction Cascades

The combination of heterogeneous catalysis and biocatalysis into one-pot reaction cascades is a potential approach to integrate enzymatic transformations into existing chemical infrastructure. Peroxygenases, which can achieve clean C-H activation,...

scholarly journals Heterogeneous acidic catalysts for the tetrahydropyranylation of alcohols and phenols in green ethereal solvents

2018 ◽  
Vol 14 ◽  
pp. 1655-1659 ◽  
Author(s):  
Ugo Azzena ◽  
Massimo Carraro ◽  
Gloria Modugno ◽  
Luisa Pisano ◽  
Luigi Urtis
Keyword(s):  
Organic Chemistry ◽  
Heterogeneous Catalysis ◽  
Important Class ◽  
Green Solvents ◽  
Reaction Products ◽  
Reaction Conditions ◽  
One Pot ◽  
Acidic Catalysts ◽  
Set Up ◽  
Work Up

The application of heterogeneous catalysis and green solvents to the set up of widely employed reactions is a challenge in contemporary organic chemistry. We applied such an approach to the synthesis and further conversion of tetrahydropyranyl ethers, an important class of compounds widely employed in multistep syntheses. Several alcohols and phenols were almost quantitatively converted into the corresponding tetrahydropyranyl ethers in cyclopentyl methyl ether or 2-methyltetrahydrofuran employing NH4HSO4 supported on SiO2 as a recyclable acidic catalyst. Easy work up of the reaction mixtures and the versatility of the solvents allowed further conversion of the reaction products under one-pot reaction conditions.

An Efficient Benzoxaborole One‐Pot Synthesis by Silia Cat DPP‐Pd Heterogeneous Catalysis using Diboronic Acid

2018 ◽  
Vol 360 (14) ◽  
pp. 2757-2761 ◽  
Author(s):  
Kana Kunihiro ◽  
Laurence Dumais ◽  
Guillaume Lafitte ◽  
Emeric Varvier ◽  
Loïc Tomas ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
One Pot ◽  
One Pot Synthesis

Improved Protocols for Microwave-Assisted Cu(I)-Catalyzed Huisgen 1,3-Dipolar Cycloadditions

2007 ◽  
Vol 72 (8) ◽  
pp. 1014-1024 ◽  
Author(s):  
Pedro Cintas ◽  
Katia Martina ◽  
Bruna Robaldo ◽  
Davide Garella ◽  
Luisa Boffa ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Microwave Irradiation ◽  
Ultrasound Irradiation ◽  
Conventional Heating ◽  
Dipolar Cycloaddition ◽  
One Pot ◽  
Click Reactions ◽  
Dipolar Cycloadditions ◽  
Microwave Assisted ◽  
New Applications

The Huisgen 1,3-dipolar cycloaddition of azides and acetylenes catalyzed by Cu(I) salts, leading to 1,2,3-triazoles, is one of the most versatile "click reactions". We have developed a series of optimized protocols and new applications of this reaction starting from several substrates, comparing heterogeneous vs homogeneous catalysis, conventional heating vs microwave irradiation or simultaneous microwave/ultrasound irradiation. Both non-conventional techniques strongly promoted the cycloaddition (bromide → azide → triazole), that could be conveniently performed in a one-pot procedure. This was feasible even with such bulky molecules as functionalized β-cyclodextrins (β-CD), starting from 61-O-tosyl-β-CD or from heptakis[6-O-(tert-butyldimethylsilyl)]-21-O-propargyl-β-CD. "Greener" heterogeneous catalysis with charcoal-supported Cu(II) or Cu(I) (prepared under ultrasound) was advantageously employed.

Single molecule study of samarium oxide nanoparticles as a purely heterogeneous catalyst for one-pot aldehyde chemistry

2016 ◽  
Vol 6 (19) ◽  
pp. 7113-7121 ◽  
Author(s):  
Gregory K. Hodgson ◽  
Stefania Impellizzeri ◽  
Juan C. Scaiano
Keyword(s):  
Heterogeneous Catalysis ◽  
Homogeneous Catalysis ◽  
Single Molecule ◽  
Metal Ion ◽  
Active Species ◽  
Oxide Nanoparticles ◽  
Samarium Oxide ◽  
One Pot ◽  
Catalytically Active

Heterogeneous catalysis holds distinct advantages over homogeneous catalysis; however, it is only truly advantageous if unaffected by metal ion leaching or in situ formation of a soluble catalytically active species.

Enzyme-based Biohybrid Foams Designed for Biodiesel Production and Continuous Flow Heterogeneous Catalysis

2013 ◽  
Vol 1492 ◽  
pp. 183-188
Author(s):  
Nicolas Brun ◽  
Hervé Deleuze ◽  
Rénal Backov
Keyword(s):  
Heterogeneous Catalysis ◽  
Enzymatic Activity ◽  
Steric Hindrance ◽  
Continuous Flow ◽  
Biodiesel Production ◽  
One Pot ◽  
Flow Device ◽  
The One ◽  
High Enzymatic Activity

ABSTRACTThe one pot-synthesis and use of monolithic biohybrid foams in a continuous flow device reported inhere presents the advantages of covalent stabilization of the enzymes, together with a low steric hindrance between proteins and substrates, an optimized mass transport due to the interconnected macroporous network and a rather simplicity in regard of the column in-situ synthetic path. Those features, concerning transesterification (biodiesel production) enzyme- based catalyzed reaction, provide high enzymatic activity addressed with bio-hybrid catalysts bearing unprecedented endurance of continuous catalysis for a two months period of time.

One-Pot Synthesis of 1,3-Dinitroalkanes under Heterogeneous Catalysis

Synthesis ◽  
2004 ◽  
Vol 2004 (12) ◽  
pp. 1938-1940 ◽  
Author(s):  
Roberto Ballini ◽  
Giovanna Bosica ◽  
Dennis Fiorini ◽  
Alessandro Palmieri
Keyword(s):  
Heterogeneous Catalysis ◽  
One Pot ◽  
One Pot Synthesis
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