scholarly journals Unravelling the one-pot conversion of biomass-derived furfural and levulinic acid to 1,4-pentanediol catalysed by supported RANEY® Ni–Sn alloy catalysts

RSC Advances ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 241-250
Author(s):  
Rodiansono ◽  
Maria Dewi Astuti ◽  
Kamilia Mustikasari ◽  
Sadang Husain ◽  
Fathur Razi Ansyah ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
Reaction Conditions ◽  
One Pot ◽  
The One ◽  
Alloy Catalysts

The RANEY® Ni–Sn(x) alloy catalysed the one-pot conversion of biomass-derived furfural and levulinic acid to allow remarkable yield of 1,4-pentanediol (up to 90%) under the mild reaction conditions.

scholarly journals A novel three-component reaction between isocyanides, alcohols or thiols and elemental sulfur: a mild, catalyst-free approach towards O-thiocarbamates and dithiocarbamates

2019 ◽  
Vol 15 ◽  
pp. 1523-1533 ◽  
Author(s):  
András György Németh ◽  
György Miklós Keserű ◽  
Péter Ábrányi-Balogh
Keyword(s):  
Elemental Sulfur ◽  
Building Blocks ◽  
Reaction Conditions ◽  
One Pot ◽  
Catalyst Free ◽  
Synthetic Procedure ◽  
Three Component Reaction ◽  
Wide Range ◽  
Organic Chemist ◽  
The One

A new multicomponent reaction has been developed between isocyanides, sulfur and alcohols or thiols under mild reaction conditions to afford O-thiocarbamates and dithiocarbamates in moderate to good yields. The one-pot reaction cascade involves the formation of an isothiocyanate intermediate, thus a catalyst-free synthesis of isothiocyanates, as valuable building blocks from isocyanides and sulfur is proposed, as well. The synthetic procedure suits the demand of a modern organic chemist, as it tolerates a wide range of functional groups, it is atom economic and easily scalable.

scholarly journals Microwave Assisted Three Component Reaction Conditions to Obtain New Thiazolidinones with Different Heterocyclic Skeletons

Proceedings ◽  
2019 ◽  
Vol 41 (1) ◽  
pp. 38
Author(s):  
Fernando J. Lorenzo ◽  
Romina A. Ocampo ◽  
Sandra D. Mandolesi
Keyword(s):  
Microwave Irradiation ◽  
Thioglycolic Acid ◽  
Aldehyde Group ◽  
Green Solvent ◽  
Reaction Products ◽  
Reaction Conditions ◽  
One Pot ◽  
Microwave Assisted ◽  
Three Component Reaction ◽  
The One

We present here a new proposal for the “one pot” generation of new 4-thiazolidinones (9a–e) through a multicomponent reaction under microwave irradiation conditions, using aromatic and heteroaromatic amines (8a–e), absolute ethanol as a “green” solvent and modifying the aldehyde group in the glycosidic residue, synthesized from D-mannitol. The study is focused in the variation of the irradiation times and the concentration of thioglycolic acid in order to study the possibility of controlling the structure and/or stereochemistry of the products formed in the reaction. Thiazolidinones 9a–d were obtained with a 69–82% The generation of the corresponding reaction products were monitored by TLC and CG-MS, taking reaction aliquots. The conditions reaction proved to be chemoselective depending on the excess of acid and irradiation times.

One-pot selective conversion of C5-furan into 1,4-pentanediol over bulk Ni–Sn alloy catalysts in an ethanol/H2O solvent mixture

2019 ◽  
Vol 21 (9) ◽  
pp. 2307-2315 ◽  
Author(s):  
Rodiansono Rodiansono ◽  
Maria Dewi Astuti ◽  
Takayoshi Hara ◽  
Nobuyuki Ichikuni ◽  
Shogo Shimazu
Keyword(s):  
Solvent Mixture ◽  
Hydrogen Gas ◽  
One Pot ◽  
Selective Conversion ◽  
The One ◽  
Alloy Catalysts

The synergistic actions between an inexpensive bulk Ni–Sn(1.5) alloy, hydrogen gas, and an ethanol/H2O solvent mixture selectively assisted the one pot conversion of C5-furan compounds to 1,4-pentanediol with outstanding yields up to 92%.

scholarly journals ZnO-beta zeolite mediated simple and efficient method for the one-pot synthesis of quinoxaline derivatives at room temperature

2010 ◽  
Vol 8 (2) ◽  
pp. 320-325 ◽  
Author(s):  
Santosh Katkar ◽  
Pravinkumar Mohite ◽  
Lakshman Gadekar ◽  
Balasaheb Arbad ◽  
Machhindra Lande
Keyword(s):  
Efficient Method ◽  
Room Temperature ◽  
Environmentally Benign ◽  
Beta Zeolite ◽  
Reaction Conditions ◽  
One Pot ◽  
One Pot Synthesis ◽  
Quinoxaline Derivatives ◽  
The One ◽  
Work Up

AbstractA rapid and an efficient one-pot method for the synthesis of quinoxalines catalysed by ZnO-beta zeolite at room temperature is described. This environmentally benign method provides several advantages over methods that are currently employed such as a simple work-up, mild reaction conditions, good to excellent yields, and a process to recover and reuse the catalyst for several cycles with consistent activity.

Silica-supported ZnCl2 — A highly active and reusable heterogeneous catalyst for the one-pot synthesis of dihydropyrimidinones–thiones

2007 ◽  
Vol 85 (3) ◽  
pp. 197-201 ◽  
Author(s):  
Raman Gupta ◽  
Monika Gupta ◽  
Satya Paul ◽  
Rajive Gupta
Keyword(s):  
Zinc Chloride ◽  
Biginelli Reaction ◽  
Catalyst Loading ◽  
Reaction Conditions ◽  
One Pot ◽  
Highly Active ◽  
Chloride Catalyst ◽  
Biginelli Compounds ◽  
The One ◽  
Low Catalyst Loading

A novel silica-supported zinc chloride catalyst was prepared and investigated for the Biginelli reaction. The key features of the catalyst include rapid reaction with 100% conversion of aldehyde, good catalyst recyclability, and high stability under the reaction conditions (passes hot filtration test successfully). A low catalyst loading (12 mol% of ZnCl2) was required to achieve a quantitative reaction. Other catalysts such as SiO2–AlCl2, SiO2–AlCl2–ZnCl2 were also prepared and their activity was compared with SiO2–ZnCl2 for the Biginelli reaction.Key words: silica gel, zinc chloride, Biginelli compounds, heterogeneous catalysis, reusability.

scholarly journals Synthesis of biscoumarin derivatives by the reaction of aldehydes and 4-hydroxycoumarin using ruthenium (III) chloride hydrate as a versatile homogeneous catalyst

2012 ◽  
Vol 77 (4) ◽  
pp. 407-413 ◽  
Author(s):  
Khalil Tabatabaeian ◽  
Hannaneh Heidari ◽  
Alireza Khorshidi ◽  
Manouchehr Mamaghani ◽  
Nosrat Mahmoodi
Keyword(s):  
Michael Reaction ◽  
Aqueous Media ◽  
Environmentally Benign ◽  
Homogeneous Catalyst ◽  
Reaction Conditions ◽  
One Pot ◽  
The One ◽  
High Yields ◽  
Chloride Hydrate ◽  
Short Times

The one-pot domino Knoevenagel-type condensation/Michael reaction of aromatic, heteroaromatic and aliphatic aldehydes with 4-hydroxycoumarin in aqueous media in the presence of ruthenium salt as homogeneous catalyst was investigated. It was found that 5 mol% of RuCl3.nH2O catalyzes biscoumarin synthesis in high yields (70-95%) under optimised, mild, green and environmentally benign reaction conditions in short times (25-35min).

Tributylhexadecylphosphonium bromide: an efficient reagent system for the one-pot synthesis of 2,4,5-trisubstituted imidazoles

2015 ◽  
Vol 21 (2) ◽  
Author(s):  
Mohammad Heidari ◽  
Mohsen Rezaei ◽  
Rashid Badri
Keyword(s):  
Cost Effectiveness ◽  
Aromatic Aldehyde ◽  
Ammonium Acetate ◽  
Reaction Times ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
One Pot ◽  
One Pot Synthesis ◽  
The One ◽  
Efficient Reagent

AbstractThe reaction of benzil, an aromatic aldehyde, and ammonium acetate in ethanol at reflux in the presence of tributylhexadecylphosphonium bromide as catalyst affords a 2,4,5-trisubstituted imidazole. The present methodology offers several advantages over the literature methods, including excellent yields, shorter reaction times, environmentally benign milder reaction conditions, cost-effectiveness of catalyst, easy workup, and purification of products by nonchromatographic methods.

scholarly journals A Facile and Catalyst-free Synthesis of Hexahydroacridine-1,8(2H,5H )-dione and Octahydroacridin-10(1H )-yl)thiourea Derivatives: Inter- and Intramolecular Aza-Michael addition

2020 ◽  
Vol 26 (1) ◽  
pp. 26-32 ◽  
Author(s):  
Nader Noroozi Pesyan ◽  
Narmin Akhteh ◽  
Hana Batmani ◽  
Barış Anıl ◽  
Ertan Şahin
Keyword(s):  
Hydroxylamine Hydrochloride ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
One Pot ◽  
Thiourea Derivatives ◽  
H Nmr ◽  
Nmr Spectrometry ◽  
The One ◽  
Convenient Technique ◽  
C Nmr

AbstractAn easy and convenient technique for the one-pot synthesis of novel compounds of hexahydroacridine-1,8(2H,5H)-dione and octahydroacridin-10(1H)-yl) thiourea derivatives has been developed by the reaction of the octahydro-1H-xanthenes with hydroxylamine hydrochloride and thiosemicarbazide in ethylene glycol, which is a green solvent, under mild reaction conditions. IR, 1H NMR, 13C NMR spectrometry, and X-ray diffraction analysis were used to identify the structures of these compounds.

Nanocrystalline Rhenium-doped TiO2: an efficient catalyst in the one-pot conversion of carbohydrates into levulinic acid. The synergistic effect between Brønsted and Lewis acid sites

2021 ◽  
Author(s):  
Sorin Avramescu ◽  
Cristian D. Ene ◽  
Madalina Ciobanu ◽  
Josefine Schnee ◽  
François Devred ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Synergistic Effect ◽  
Lewis Acid ◽  
Levulinic Acid ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
One Pot ◽  
Efficient Catalyst ◽  
The One ◽  
Brønsted And Lewis Acid

Catalytic activity of TiO2, 2%Re-TiO2 and 10%Re-TiO2 in the conversion of carbohydrates into levulinic acid under autoclave conditions was evaluated. These materials were prepared by aerogel method and characterized by...

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