Results 81 to 90 of about 44,043 (291)
Molecules, 2001 New podand and crown ether derivatives of 3,5-disubstituted 4H-pyran-4-one (8-11) were prepared by the nucleophilic substitution reaction of 3,5-bis(bromomethyl)-2,6-diphenyl-4H-pyran-4-one with o-nitrophenol, 8-hydroxyquinoline, 2-hydroxymethyl pyridine
Alireza Banaei, Aziz Shahrisa
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Synthesis of 5,6-dihydro-2H-pyran-2-ones (microreview) [PDF]
, 2016 [Figure not available: see fulltext.][Figure not available: see fulltext.] 5,6-Dihydro-2H-pyran-2-ones constitute an important class of heterocyclic compounds which also may be considered as α,β-unsaturated δ-lactones.
Eskandari, K., Rafieian-Kopaei, M.
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Food Chemistry International, EarlyView.Date syrup are used as sweetener in bread. Bread with date syrup had superior phenolic composition, better antioxidant properties and carbohydrate hydrolysing enzymes while bread with granulated sugar had higher predicted glyceamic index. The study concluded that date syrup could be the next though‐out ingredient for dual purpose in bread. ABSTRACT The
Akinsola Albert Famuwagun +7 more
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Green Chemistry Letters and Reviews, 2018 In the present work, a new magnetically recyclable nanocomposite catalyst was designed, prepared, and characterized by Fourier transform infrared (FT-IR) spectroscopy, field-emission scanning electron microscopy (FE-SEM) images, X-ray diffraction (XRD ...
Ali Maleki, Mojtaba Azizi, Zeynab Emdadi
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9-(2,4-Dinitrophenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione
Acta Crystallographica Section E, 2013 In the title compound, C23H24N2O7, the central 4H-pyran ring adopts a flattened boat conformation, whereas both cyclohexenone rings adopt envelope conformations, the C atom bearing the dimethyl substituent being the flap atom in each case.
N. Sureshbabu, V. Sughanya
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Photochromic carbazole photoinitiators for precision visible‐light photopolymerization
Polymer International, EarlyView.New carbazole–naphthopyran derivatives were employed as visible‐light‐activated photoinitiators, enabling rapid and localized radical photopolymerization to produce well‐defined thin solid objects within minutes. Abstract Two carbazole derivatives, each incorporating a naphthopyran unit and an aromatic ketone, were synthesized and evaluated as ...
Mauro Magalhães +3 more
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5-Acetyl-2-amino-4-(2-fluorophenyl)-6-methyl-4H-pyran-3-carbonitrile dichlomethane hemisolvate
IUCrDataThe title compound, 2C15H13FN2O2·CH2Cl2, crystallizes with two main molecules in the asymmetric unit with a disordered dichloromethane solvent molecule.
Carren Nyapola +3 more
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Thioether-catalysed tandem synthesis of furans and cyclic ethers or lactones [PDF]
, 2017 Acyclic conjugated ynenediones tethered to an alcohol or carboxylic acid are converted into furanyl-substituted cyclic ethers or lactones in a single step by treatment with the tetrahydrothiophene.
Clark, J. Stephen, Klaus, Verena
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The continuing significance of chiral agrochemicals
Pest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
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Danishefsky’s Diene vs Rawal’s Diene in [4+2] Hetero-Diels-Alder Reactions with Aldehydes
Журнал органічної та фармацевтичної хіміїThe Diels-Alder reaction remains one of the most versatile and widely employed cycloaddition strategies in synthetic organic chemistry. The development of functionalized dienes, particularly Danishefsky’s diene (DD) and Rawal’s diene (RD), has ...
Oleksii I. Shamrai +1 more
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