Results 81 to 90 of about 4,172 (223)

9-(4-Hydroxybutyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione

open access: yesMolbank, 2016
The title compound 9-(4-hydroxybutyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione was synthesized in 72% yield through a simple, convenient and environmentally friendly one-pot reaction between dimedone and 3,4-dihydro-2H-pyran in
Camilo A. Navarro   +2 more
doaj   +1 more source

Homogeneous Pd-Catalyzed Enantioselective Decarboxylative Protonation [PDF]

open access: yes, 2008
General homogeneous conditions for the palladium-catalyzed synthesis of carbonyl compounds with tertiary carbon stereocenters at the α-position are reported.
Marinescu, Smaranda C.   +3 more
core   +2 more sources

N‐Containing Carbon Materials in Metal‐Free and Non‐Noble Metal Liquid Phase Heterogenous Catalysis

open access: yesAdvanced Synthesis &Catalysis, Volume 367, Issue 22, November 28, 2025.
Over 100 examples of non‐noble metal supported on N‐containing and metal‐free N‐containing carbon catalysts are discussed. Particular emphasis is put on how different N‐functionalities influence catalyst performance and stability. Preparation procedures are also examined, with a strong focus on how the heat treatment temperature influences N ...
Fulvio Varamo, Anna Katharina Beine
wiley   +1 more source

9-(4-Formylphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione

open access: yesIUCrData, 2018
In the title compound, C24H26O4, the central 4H-pyran ring adopts a flattened boat conformation, with the mean and maximum deviations of the ring being 0.0582 (6) and 0.1012 (3) Å, respectively.
R. Kalaivanan   +2 more
doaj   +1 more source

Advances in Enaminomaleimides Chemistry: Synthesis, Chemical Applications, and Perspectives

open access: yesChemistryEurope, Volume 3, Issue 5, September 18, 2025.
Enaminomaleimides are versatile building blocks for the construction of functionalized heterocycles. Their unique nucleophilic character, contrasting with the classical electrophilic nature of maleimides, enables diverse synthetic applications, showing promising potential in both materials science and medicinal chemistry.
Adrián López‐Francés   +5 more
wiley   +1 more source

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

Magnetic Layered Double Hydroxide Nanocomposites: Synthesis, Catalytic Performances, Environmental and Biological Applications

open access: yesENERGY &ENVIRONMENTAL MATERIALS, Volume 8, Issue 5, September 2025.
This review involves a comprehensive study on the diverse applications of the magnetic layered double hydroxides (LDHs) including their catalytic performances, as well as, environmental and biological functions. Moreover, different strategies utilized for the synthesis of LDH‐based composites are described.
Mohammad Mavvaji   +2 more
wiley   +1 more source

Каталитический синтез простых и сложных эфиров 2,2{1}-арилметилен-бис-(3-гидрокси-5,5-диметилциклогекс-2-енонов) и 3,3,6,6-тетраметил-9-арил-3,4,5,6,7,9-гексагидро-1H-ксантен-1,8(2H)-дионов [PDF]

open access: yes, 2013
БЕНЗАЛЬДЕГИДЫдимедонКСАНТЕНЫЭФИРЫ ...
Дикусар, Е. А.   +5 more
core  

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  

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