Results 41 to 50 of about 3,742 (239)
Hydrochloric acid immobilized on nano‐titanium dioxide: a novel and efficient nanocatalyst for the synthesis of tetrahydrobenzo[b]pyrans [PDF]
شیمی کاربردی روز, 2017 Hydrochloric acid was immobilized onto the surface of amine functionalized nano‐titania. For this purpose, 2,4‐toluene diisocyanate (TDI) as a bi‐functional covalent linker was grafted onto a nano‐titania and next, the unreacted isocyanate groups were ...
Taiebeh Shamsi +2 more
doaj +1 more source
Dynamic Fluorescence Modulation via Light‐Driven Competitive Protonation
Advanced Optical Materials, EarlyView.A two‐component molecular system demonstrates reversible, light‐driven fluorescence write–erase cycling and thermal imaging. Illumination of a merocyanine photoacid transfers a proton to a highly efficient fluorescent pyridinium dye, switching its emission color; thermal relaxation reverses the process in the dark.
Serena X. Liu +10 more
wiley +1 more source
Ionic liquid–driven pyran synthesis: Pathways and perspectives
Journal of Ionic LiquidsPyrans and their fused derivatives are privileged oxygen heterocycles with broad biological activity and industrial relevance, yet their sustainable synthesis remains a continuing challenge.
Pravas Maity, Amrit Krishna Mitra
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Scientific Reports, 2023 A novel magnetic silica/graphene oxide nanocomposite supported ionic liquid/manganese complex (Fe3O4@SiO2-NH2/GO/IL-Mn) is prepared, characterized and its catalytic application is investigated.
Farkhondeh Dadvar, Dawood Elhamifar
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Synthesis of New 2-Substituted 4-(2-Furyl)-4H-pyrans
, 1994 Substituted 2-amino-3-cyano-4H-pyrans represent important precursors in syntheses of condensed heterocycles containing a 4H-pyran nucleus. In the context of studies of reactivity of 2-amino-5-acetyl-4-(5-X-2-furyl)-3-cyano-6-methyl-4H-pyrans we were ...
Dušan Ilavský +3 more
core +1 more source
Advanced Optical Materials, EarlyView.Spherical liquid crystal polymer microlasers with a bipolar configuration confine lasing to a single equatorial plane, allowing precise control over where the laser emission is generated. The anisotropic refractive index profile additionally lifts the energy degeneracy of azimuthal whispering gallery modes, which causes a characteristic splitting into ...
David Ripp +5 more
wiley +1 more source
Advanced Science, EarlyView.Ox‐mtDNA fragments escaping from mitochondria drive robust inflammatory responses. A targeted nanoplatform simultaneously inhibits mitochondrial FEN1‐mediated mtDNA cleavage and scavenges ROS, preventing the generation of immunogenic Ox‐mtDNA fragments. The released SeNPs further promote autophagic clearance of cytosolic mtDNA. Consequently, cGAS‐STING,
Wen‐Ling Li +7 more
wiley +1 more source
Advanced Science, EarlyView.KFO‐Atlas reveals how real‐world aromas are organized as structured mixtures rather than individual molecules. Building on these principles, KFO‐Gen, a generative AI framework, designs perceptually valid aroma formulations and reconstructs meat‐like aromas exclusively from plant‐derived odorants, providing a foundation for mixture‐level studies and AI ...
Jingzhi Zhang +5 more
wiley +1 more source
HeliyonIn this study, a novel natural deep eutectic solvent (NADES) composed of proline (HBA), choline chloride (HBA), glycerol (HBD) (1:1:6) was designed and utilized for the green synthesis of tetrahydrobenzo[b]pyrans.
Fatemeh Pirani, Hossein Eshghi
doaj +1 more source
Molecules, 2022 A straightforward approach for the construction of the new class of conjugated pyrans based on enamination of 2-methyl-4-pyrones with DMF-DMA was developed.
Dmitrii L. Obydennov +8 more
doaj +1 more source