Results 81 to 90 of about 1,271 (129)
9-(4-Formylphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione
IUCrData, 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
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, 2010 The kinetics of oxidation of dimedone in perchloric acid medium were studied spectrophotometrically. The reaction showed first order kinetics in quinolinium dichromate (QDC) concentration and an order of less than unity in 5,5-dimethylcyclohexane-1,3 ...
Sharanappa T. Nandibewoor +2 more
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Molecules, 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
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Synthesis of new 1, 8-dioxo-octahydroxanthene derivatives containing 4-thiazolidinone moiety containing 4-thiazolidinone moiety [PDF]
Iranian 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
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The structure of Dimedone and the effect of solvents on Keto-enol Tautomerism
, 1953 An infra-red spectroscopic examination of dimedone has shown that in non-polar solvents this compound exists in the diketo- rather than the mono-en01 form.
CL Angell, RL Werner
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Aqueous citric acid as green reaction media for the synthesis of octahydroxanthenes
Revista 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
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A queer product of the Beirut reaction with dimedone-AM1 analysis
, 2002 Dimedone reacted with benzofuraxane in the presence of Et3N. The expected products were quinoxaline derivatives but an unexpected compound was obtained in low yield. The structural identification of the product was done spectrally and a mechanism for its
Dura, E, Türker, Burhan Lemi
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The preparation of dimedone derivatives of amino acids and their use in peptide synthesis
, 1965 The preparation of dimedone derivatives of amino acids has been effected by saponification of the corresponding alkyl esters, and also by catalytic hydrogenation of the respective benzyl esters.
B Halpern
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, 2013 Reaction of 5,5-dimethylcyclohexane-1,3-dione (dimedone), aldehydes and cyanogen bromide in the presence of triethylamine leads to the selective formation of spiro dihydrofurans in moderate to good yields at room ...
Pesyan, Nader Noroozi +3 more
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[Fe(III)(Salen)Cl] Complex as a Catalyst for the Synthesis of 1, 8-Dioxo-Octahydroxanthene Derivatives [PDF]
Journal 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
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