Results 31 to 40 of about 10,732 (222)
Michael condensation of 2-(4-carboxybenzylidene)-3,4-dihydronaphthalene-1(2H)-one with methylene active compounds in the targeted synthesis of O-heterocyclic hybrid systems [PDF]
Известия Саратовского университета. Новая серия: Серия Химия. Биология. Экология, 2022 Approaches to the design of new hybrid polyoxaheterocyclic compounds based on the interaction of 2-(4-carboxybenzylidene)-3,4- dihydronaphthalene-1(2H)-one with methylene active compounds of the 2H-chromen-2-one series – 3 -(1,3-dioxobutan-1-yl)-2H-
Kanevskaya, Irina V. +3 more
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Molbank, 2021 Synthesis of a series of the substituted [(pyridinyl and pyrimidin-2-ylimino)-ethyl]-4-hydroxy-chromen-2-ones and their tetrazole derivates is presented in this study. By catalytic condensation of 4-hydroxy-3-acetylcoumarine 2 and 2-aminopyridines 3(a-d),
Ramiz Hoti +5 more
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Molecules, 2009 (7-Hydroxy-2-oxo-2H-chromen-4-yl)-acetic acid methyl ester(1) upon reaction with ethyl bromoacetate furnishes (7-ethoxycarbonylmethoxy-2-oxo-2H-chromen-4-yl)-acetic acid methylester (2), which on treatment with 100% hydrazine hydrate yields (7 ...
Valentina Rajkovic +4 more
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, 2016 Coumarin, a naturally occurring or synthesised phytochemical, displays a wide range of biological activities. However, chromen-2-ones fused with 1,3-benzoxazine rings is not well documented and there is a gap in the literature which required engaging ...
Jasim M. A. Al-Rawi (2814616) +1 more
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One pot synthesis of substituted 1H-benzo[f]chromen-3-yl-2H-chromen-2-one derivatives [PDF]
, 2017 The title compounds, substituted 1H-benzo[f]chromen-3-yl-2H-chromen-2-ones were obtained by reacting 3-aryl-1-(3-coumarinyl)propen-1-ones with 2-napthol catalyzed by DBU (1,8-diazabicyclo[5,4,0]undec-7-ene) and concentrated H2SO4 in ample yields.
Prasanna, Bethanamudi +5 more
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Polyphenol-Rich Duhuo Jisheng Decoction Enhances Mesenchymal Stem Cell-Derived Exosome-Mediated Chondroprotection via PI3K/AKT Signaling in Osteoarthritis. [PDF]
Food Sci NutrThis graphical abstract illustrates the chondroprotective mechanism of exosomes derived from bone marrow mesenchymal stem cells (BMSCs) preconditioned with polyphenol‐rich Duhuo Jisheng Decoction (DHJST‐Exos). Enriched with bioactive compounds such as wogonin, quercetin, and kaempferol, DHJST‐Exos effectively ameliorate osteoarthritis (OA ...
Liao Z +9 more
europepmc +2 more sources
Chemistry ProceedingsIn this study, the aerial parts of Scadoxus multiflorus were extracted using methanol through a maceration process. The resulting methanol crude extract was subsequently partitioned with solvents including n-hexane, chloroform, ethyl acetate, and n ...
Olaiya Akeem Ayodele +3 more
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A Novel Synthesis of 4H-Chromen-4-ones via Intramolecular Wittig Reaction
, 2016 The acylphosphoranes formed in a sequential manner from the reaction of the silyl ester of O-acyl(aroyl)salicylic acids and (trimethylsilyl)methylenetriphenylphosphorane undergo intramolecular Wittig cyclization on the ester carbonyl to afford the 4H ...
Pradeep Kumar (310858) +1 more
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Molecules, 2018 A series of 2-imino-2H-chromen-3-yl-1,3,5-triazine compounds 5–12, which are namely hybrids of 2,4-diamino-1,3,5-triazines and 2-imino-coumarins, was synthesized by reacting 2-(4,6-diamine-1,3,5-triazin-2-yl)acetonitriles 1–4 with 2 ...
Anna Makowska +4 more
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, 2016 A series of novel 2-oxo-1,2-diphenylethylidene hydrazinyl thiadiazinyl-2H-chromen-2-ones (shown in Scheme 1) have been synthesized via multicomponent approach by the reaction of equimolar amount of benzil (1), thiocarobohydrazide (2), and substituted of
Krishnaiah Vaarla (2887484) +2 more
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