A choline chloride/DMSO solvent for the direct synthesis of diformylfuran from carbohydrates in the presence of heteropolyacids

2015 ◽  
Vol 17 (8) ◽  
pp. 4459-4464 ◽  
Author(s):  
W. Ghezali ◽  
K. De Oliveira Vigier ◽  
R. Kessas ◽  
F. Jérôme
Keyword(s):  
Choline Chloride ◽  
Direct Synthesis ◽  
One Pot ◽  
Keggin Heteropolyacids ◽  
The One

Here we report the one pot conversion of fructose to DFF in the presence of a mixture of choline chloride (ChCl) and DMSO as a solvent and Mo-Keggin heteropolyacids.

A self-assembled octanuclear complex bearing the uncommon close-packed {Fe4Mn4(μ4-O)4(μ-O)4} molecular core

2015 ◽  
Vol 44 (33) ◽  
pp. 14918-14924 ◽  
Author(s):  
Oksana V. Nesterova ◽  
Eduard N. Chygorin ◽  
Vladimir N. Kokozay ◽  
Irina V. Omelchenko ◽  
Oleg V. Shishkin ◽  
...  
Keyword(s):  
Schiff Base ◽  
Direct Synthesis ◽  
Synthesis Method ◽  
Schiff Base Complex ◽  
Metal Core ◽  
One Pot ◽  
Base Complex ◽  
Molecular Core ◽  
The One ◽  
Heterometallic Compound

An Fe/Mn Schiff base complex with an unprecedented metal core type for a heterometallic compound, has been prepared by the one-pot direct synthesis method and magnetostructurally characterized.

scholarly journals An efficient and green protocol for the one-pot synthesis of 3-amido-alkyl-4-hydroxycoumarin derivatives by choline chloride/urea as a deep eutectic solvent

2020 ◽  
Vol 65 (9) ◽  
pp. 795-800
Author(s):  
Hamed ASADI ◽  
◽  
Hossein ANARAKI-ARDAKANI ◽  
Parviz TORABI ◽  
Narghes TAHERI ◽  
...  
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
One Pot ◽  
Green Protocol ◽  
One Pot Synthesis ◽  
The One

scholarly journals Direct Synthesis of Functional Zeolitic Materials

2012 ◽  
Vol 2012 ◽  
pp. 1-24 ◽  
Author(s):  
Manuel Moliner
Keyword(s):  
Molecular Sieves ◽  
Direct Synthesis ◽  
One Pot ◽  
Potential Applicability ◽  
Direct Preparation ◽  
Template Free ◽  
The One ◽  
Zeolite Growth ◽  
Zeolitic Materials

Recently, the direct synthesis of zeolitic materials has received much attention because several well-defined functionalities have been introduced in those materials by “one-pot” methodologies. The rationalization of the physics and chemistry of the processes involved in the zeolite growth has allowed the direct preparation of different functional molecular sieves with unique properties and potential applicability in industry. In the present paper, the “one-pot” preparations of metal-containing zeolites (both in framework and extra-framework positions), hybrid organic-inorganic molecular sieves, hierarchical microporous mesoporous zeotypes, nanosheets, nanozeolites, or template-free molecular sieves are intensively evaluated.

Heterogeneous catalysis for the direct synthesis of chemicals by borrowing hydrogen methodology

2015 ◽  
Vol 5 (3) ◽  
pp. 1412-1427 ◽  
Author(s):  
Ken-ichi Shimizu
Keyword(s):  
Heterogeneous Catalysis ◽  
Transition Metal ◽  
Hydrogen Transfer ◽  
Direct Synthesis ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
One Pot ◽  
One Pot Synthesis ◽  
Borrowing Hydrogen ◽  
The One

This review summarizes the recent examples of hydrogen transfer-type reactions using supported transition metal catalysts with special emphasis on the one-pot synthesis of chemicals by borrowing hydrogen methodology.

Convenient One-Pot Synthesis of 9H-Carbazoles by Microwave Irradiation Employing a Green Palladium-Based Nanocatalyst

Synthesis ◽  
2021 ◽  
Author(s):  
Darío C. Gerbino ◽  
H. Sebastián Steingruber ◽  
Pamela Mendioroz ◽  
María A. Volpe
Keyword(s):  
Microwave Irradiation ◽  
Direct Synthesis ◽  
Reaction Times ◽  
One Pot ◽  
One Pot Synthesis ◽  
Ligand Free ◽  
Palladium Catalyzed ◽  
Scalable Synthesis ◽  
The One ◽  
High Yields

AbstractAn efficient palladium-catalyzed tandem reaction for the one-pot synthesis of 9H-carbazoles under microwave irradiation is developed. This approach involves a sequential Buchwald–Hartwig amination and a direct arylation from affordable and inexpensive anilines and 1,2-dihaloarenes. For the development of this purpose, a novel and magnetically recoverable palladium nanocatalyst supported on a green biochar under ligand-free conditions is used. Compared to other existing palladium-based protocols, the present synthetic methodology shows a drastic reduction in reaction times and excellent compatibility with different functional groups allowing to obtain a small library of 9H-carbazoles in high yields and with good regioselectivity. This procedure represents the first example in the direct synthesis of carbazoles using a heterogeneous palladium nanocatalyst from commercial precursors. To examine the application of this protocol, a direct and scalable synthesis of the bioactive carbazole alkaloid clausenalene from commercially available starting materials is described.

The direct synthesis of symmetrical disulfides and diselenides by metal–organic framework MOF-199 as an efficient heterogenous catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87564-87570 ◽  
Author(s):  
Mohammad Soleiman-Beigi ◽  
Issa Yavari ◽  
Fatemeh Sadeghizadeh
Keyword(s):  
Polyethylene Glycol ◽  
Metal Organic Framework ◽  
Direct Synthesis ◽  
Aryl Halides ◽  
One Pot ◽  
Metal Organic ◽  
Heterogenous Catalyst ◽  
The One ◽  
Symmetrical Disulfides ◽  
Efficient Heterogeneous Catalyst

The MOF-199 was used as an efficient heterogeneous catalyst for the one-pot synthesis of organic disulfides/diselenides from aryl halides and elemental S/Se in polyethylene glycol (PEG) with good to excellent yields.

Direct synthesis of α-aminophosphonates from biomass resources catalyzed by HReO4

2018 ◽  
Vol 20 (14) ◽  
pp. 3242-3245 ◽  
Author(s):  
Vera M. S. Isca ◽  
Ana C. Fernandes
Keyword(s):  
Direct Synthesis ◽  
One Pot ◽  
Efficient Catalyst ◽  
Biomass Resources ◽  
The One ◽  
Heteroatom Compounds

HReO4 as an efficient catalyst for the one-pot sustainable synthesis of heteroatom compounds, containing N and P atoms, directly from biomass resources.

The Effects of Amines on the Esterase Activities of Thrombin and Thrombokinase and on Several Clotting Tests

1974 ◽  
Vol 31 (02) ◽  
pp. 309-318
Author(s):  
Phyllis S Roberts ◽  
Raphael M Ottenbrite ◽  
Patricia B Fleming ◽  
James Wigand
Keyword(s):  
Choline Chloride ◽  
Polymerization Process ◽  
Ammonium Bromide ◽  
Bovine Thrombin ◽  
One Stage ◽  
Human Proteins ◽  
Rate Of Hydrolysis ◽  
The One ◽  
Hydrolysis Of Esters ◽  
Hydrolysis Of

Summary1. Choline chloride, 0.1 M (in 0.25 M Tris. HCl buffer, pH 7.4 or 8.0, 37°), doubles the rate of hydrolysis of TAME by bovine thrombokinase but has no effect on the hydrolysis of this ester by either human or bovine thrombin. Only when 1.0 M or more choline chloride is present is the hydrolysis of BAME by thrombokinase or thrombin weakly inhibited. Evidence is presented that shows that these effects are due to the quaternary amine group.2. Tetramethyl ammonium bromide or chloride has about the same effects on the hydrolysis of esters by these enzymes as does choline chloride but tetra-ethyl, -n.propyl and -n.butyl ammonium bromides (0.1 M) are stronger accelerators of the thrombokinase-TAME reaction and they also accelerate, but to a lesser degree, the thrombin-TAME reaction. In addition, they inhibit the hydrolysis of BAME by both enzymes. Their effects on these reactions, however, do not follow any regular order. The tetraethyl compound is the strongest accelerator of the thrombokinase-TAME reaction but the tetra-ethyl and -butyl compounds are the strongest accelerators of the thrombin-TAME reaction. The ethyl and propyl compounds are the best (although weak) inhibitors of the thrombokinase-BAME and the propyl compound of the thrombin-BAME reactions.3. Tetra-methyl, -ethyl, -n.propyl and -n.butyl ammonium bromides (0.01 M) inhibit the clotting of fibrinogen by thrombin (bovine and human proteins) at pH 7.4, imidazole or pH 6.1, phosphate buffers and they also inhibit, but to a lesser degree, a modified one-stage prothrombin test. In all cases the inhibition increases regularly as the size of the alkyl group increases from methyl to butyl. Only the ethyl com pound (0.025 M but not 0.01 M), however, significantly inhibits the polymerization of bovine fibrin monomers. It was concluded that inhibition of the fibrinogen-thrombin and the one-stage tests by the quaternary amines is not due to any effect of the com pounds on the polymerization process but probably due to inhibition of thrombin’s action on fibrinogen by the quaternary amines.

Sign in / Sign up

Export Citation Format

Share Document