scholarly journals One pot conversion of glucose to ethyl levulinate over a porous hydrothermal acid catalyst in green solvents

RSC Advances ◽  
2019 ◽  
Vol 9 (35) ◽  
pp. 20341-20344 ◽  
Author(s):  
Monika Bosilj ◽  
Johannes Schmidt ◽  
Anna Fischer ◽  
Robin J. White
Keyword(s):  
Acid Catalyst ◽  
Green Solvents ◽  
Green Solvent ◽  
One Pot ◽  
Ethyl Levulinate

One-pot conversion of glucose to ethyl levulinate over an acid-functionalised hydrothermal carbon gives high initial yields up to 37 mol% (comparable to H2SO4) with catalyst performance strongly influenced by green solvent choice.

scholarly journals PRAVADOLINE SYNTHESIS USING AN IMIDAZOLIUM-BASED IONIC LIQUID AS A GREEN SOLVENT

2011 ◽  
Vol 14 (3) ◽  
pp. 79-86
Author(s):  
Nam Thanh Son Phan ◽  
Ha Vu Le
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Acid Catalyst ◽  
High Yield ◽  
Viet Nam ◽  
Pharmaceutical Chemical ◽  
Green Solvents ◽  
Green Solvent ◽  
1H And 13C Nmr ◽  
Lewis Acid Catalyst

An easily accessible ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) was synthesized, and characterized using 1H and 13C NMR, and MS. The ionic liquid was demonstrated to be an efficient green solvent for the synthesis of pravadoline, one of non-steroidal drugs. High yield was achieved without the presence of an anhydrous Lewis acid catalyst. The reaction was also successfully carried out using other imidazolium-based ionic liquids, including 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMIM][PF6]), and 1-octyl-3- methylimidazolium hexafluorophosphate ([OMIM][PF6]). To our best knowledge, this is the first report in Viet Nam on the synthesis of a pharmaceutical chemical in ionic liquids as green solvents.

Study of a recycling reaction system for catalytic transformation of biomass-based carbohydrates via acidic-polar biphasic conditions

2020 ◽  
Vol 5 (8) ◽  
pp. 1405-1409 ◽  
Author(s):  
Surachai Karnjanakom ◽  
Asep Bayu ◽  
Panya Maneechakr ◽  
Chanatip Samart ◽  
Suwadee Kongparakul ◽  
...  
Keyword(s):  
Reaction System ◽  
Acid Catalyst ◽  
Biphasic System ◽  
Catalytic Transformation ◽  
One Pot ◽  
Ethyl Levulinate

Ethyl levulinate was easily produced via one-pot conversion of sucrose under a reusable biphasic system over an active/stable acid catalyst.

scholarly journals A Bifunctional Metal/Acid Catalyst for One-pot Multistep Synthesis of Pharmaceuticals

2020 ◽  
Vol 60 (4) ◽  
pp. 499-507
Author(s):  
Maria Victoria Lopez-Prado ◽  
María J. Sabater ◽  
Avelino Corma
Keyword(s):  
Acid Catalyst ◽  
One Pot ◽  
Multistep Synthesis

ZrOCl2·8H2O: an efficient Lewis acid catalyst for the one-pot multicomponent synthesis of β-acetamido ketones

Tetrahedron ◽  
2006 ◽  
Vol 62 (17) ◽  
pp. 4059-4064 ◽  
Author(s):  
Rina Ghosh ◽  
Swarupananda Maiti ◽  
Arijit Chakraborty ◽  
Santu Chakraborty ◽  
Alok K. Mukherjee
Keyword(s):  
Lewis Acid ◽  
Acid Catalyst ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Lewis Acid Catalyst ◽  
The One

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.

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