Results 61 to 70 of about 1,772 (162)

Characterization of Polysulfides, Polysulfanes, and Other Unique Species in the Reaction between GSNO and H2S

open access: yesMolecules, 2019
Glutathione-based products, GSnX, of the reaction of hydrogen sulfide, H2S, S-nitroso glutathione, and GSNO, at varied stoichiometries have been analyzed by liquid chromatography high-resolution mass spectrometry (LC-HRMS) and chemical trapping ...
Murugaeson R Kumar, Patrick J Farmer
doaj   +1 more source

Advances in Mechanochemical Methods for One‐Pot Multistep Organic Synthesis

open access: yesChemistry – A European Journal, Volume 31, Issue 34, June 17, 2025.
This review highlights recent advances in mechanochemical methods for multistep organic synthesis, focusing on sequential one‐pot approaches performed by grinding or ball milling. The presented transformations are discussed in terms of efficiency, applicability, and sustainability, assessing both the challenges and potential of solvent‐free one‐pot ...
Nina Biedermann, Michael Schnürch
wiley   +1 more source

Aqueous citric acid as green reaction media for the synthesis of octahydroxanthenes

open access: yesRevista Colombiana de Química, 2013
A simple, convenient and environmentally friendly one-pot procedure for the synthesis of 1,8-dioxo-octahydroxanthenes by the reaction of dimedone and aromatic aldehydes in aqueous citric acid is described. In this green synthetic protocol promoted by the
Camilo A. Navarro D.   +2 more
doaj  

Synthesis of new 1, 8-dioxo-octahydroxanthene derivatives containing 4-thiazolidinone moiety containing 4-thiazolidinone moiety [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2017
A series of novel 1, 8-dioxo-octahydroxanthene derivatives containing 4-thiazolidinone framework (4a-f) were synthesized through a four-step reaction starting from the reduction of nitro derivatives of 1, 8-dioxo-octahydroxanthenes.
Maryam Robati   +3 more
doaj  

[Fe(III)(Salen)Cl] Complex as a Catalyst for the Synthesis of 1, 8-Dioxo-Octahydroxanthene Derivatives [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2013
1, 8-Dioxo-octahydroxanthene derivatives have efficiently been synthesized from dimedone and aromatic aldehydes using [Fe(III)(salen)Cl] complex as an efficient and homogeneous catalyst in molten tetrabutyl ammonium bromide.
H. Khabazzadeh   +2 more
doaj  

Ultrasound assisted 1,4-diazabicyclo[2.2.2]octaniumdiacetate multicomponent synthesis of benzodiazepines: A novel, highly efficient and green protocol

open access: yesActa Chimica Slovenica, 2018
A simple and efficient method is presented for the synthesis of benzodiazepines through the multicomponent reaction of o-phenylenediamine, various aldehydes and 5,5-dimethylcyclohexane-1,3-dione (dimedone) in the presence of the acidic bis ionic liquid 1,
Leila Zare Fekri   +2 more
doaj   +1 more source

Bismuth nitrate as an efficient recyclable catalyst for the one-pot multi component synthesis of 1,4-dihydropyridine derivatives through unsymmetrical Hantzsch reaction

open access: yesJournal of Saudi Chemical Society, 2016
Bismuth nitrate catalyzed efficient Hantzsch reaction via four-component coupling reactions of aromatic aldehydes, 5,5-dimethyl-1,3-cyclohexanedione (dimedone), ethyl acetoacetate and ammonium acetate at 80 °C temperature was described as the preparation
S. Sheik Mansoor   +3 more
doaj   +1 more source

One Pot Synthesis of Polyhydroquinolines Catalyzed by Sulfonic Acid Functionalized SBA-15 as a New Nanoporous Acid Catalyst under Solvent Free Conditions [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2010
Sulfonic acid functionalized SBA-15 (SBA-Pr-SO3H) as a new nanoporous acid catalyst was used in the one-pot synthesis of polyhydroquinolines derivatives via the Hantzsch four component condensation reaction of aldehydes, b-ketoesters, dimedone and ...
Ghodsi Mohammadi Ziarani   +3 more
doaj  

Application of Sulfonic Acid Functionalized Nanoporous Silica (SBA-Pr-SO3H) in the Green One-pot Synthesis of Polyhydroacridine Libraries [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2013
1,8-Dioxo-decahydroacridines have been synthesized by the three-component reaction of aromatic aldehydes, aromatic amines (or ammonium acetate), and dimedone in the presence of sulfonic acid functionalized nanoporous silica (SBA-Pr-SO3H) under solvent ...
Ghodsi Mohammadi Ziarani   +4 more
doaj  

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