Results 31 to 40 of about 20,891 (238)
Green Chemistry Letters and Reviews, 2019 A simple, efficient, eco-friendly and catalyst-free procedure was developed for the construction of novel coumarin-spiro[indoline-3,4'-pyran] conjugates via three-component reactions of various synthetic beta-ketoesters with isatins and malononitrile in ...
Adil Omar, Keyume Ablajan
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Acta Chimica Slovenica, 2017 Novel tetrahydrobenzo[b]thienopyrole derivatives were synthesized from 2-amino-3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophene (1) through its reaction with α-chloroacetone to give the corresponding N-alkyl derivative 3.
Rafat Milad Mohareb +2 more
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Red-Light Triggered Photouncaging from Dicyanomethylene-4H-pyran Phototrigger in Aqueous Solution: Applied as a Single Component Nano-Drug Delivery System for Cancer Therapy [PDF]
, 2021 The development of Photoremovable protecting groups (PRPGs), which can be activated in the ʽphototherapeutic windowʼ for biological applications, is highly challenging.
Mahitosh, Mondal +6 more
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Acta Crystallographica Section E: Crystallographic Communications, 2019 The title compounds, 6-(naphthalen-1-yl)-6a-nitro-6,6a,6 b,7,9,11a-hexahydrospiro[chromeno[3′,4′:3,4]pyrrolo[1,2-c]thiazole-11,11′-indeno[1,2-b]quinoxaline], C37H26N4O3S, (I), and 6′-(naphthalen-1-yl)-6a′-nitro-6′,6a′,6b′,7′,8′,9′,10′,12a′-octahydro-2H ...
G. Foize Ahmad +4 more
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Novel One-Pot Synthesis of Pyrazolopyranopyrimidinones Using Newly Produced γ-Alumina Nanoparticles as Powerful Catalyst [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2018 g-Alumina nanoparticles (g-Al2O3 NPs) were prepared via a new and simple synthetic route and characterized by field emission scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy.
Sajad Kiani +4 more
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Molecules, 2012 The multicomponent reaction (MCR) of aromatic aldehydes 1 and malononitrile (2) with active methylenes 5a–h in the presence of L-proline produced pyrans and thiopyrans 6a–h stereospecifically and in good yields.
Noura Saad Al-Hokbany +1 more
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PRENYLATED XANTHONES FROM Rheedia acuminata [PDF]
Acta Amazonica, 1993 Pyranojacareubin; 1,5-dihydroxy-6',6'-dimethyl-2H-pyran(2',3':6,7) -6",6"-dim-ethyI-2H,4H-pyran(2",3":2,3)xanthone and a new xanthone l,6-dihydroxy-5-methoxy-6',6'-dim-ethyl-2H-pyran(2',3':3,2)-7-(3,3-dimethylprop-2-enyl)xanthone were isolated from the ...
Maria das G. B ZOGHBI +3 more
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An overview of structure-based activity outcomes of pyran derivatives against Alzheimer’s disease
Saudi Pharmaceutical Journal, 2023 Pyran is a heterocyclic group containing oxygen that possesses a variety of pharmacological effects. Pyran is also one of the most prevalent structural subunits in natural products, such as xanthones, coumarins, flavonoids, benzopyrans, etc. Additionally
Faisal A. Almalki
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Mosquito larvicidal potential of hydroxy-2-methyl-4H-pyran-4-one (MALTOL) isolated from the methanol root extract of Senecio laetus Edgew. and its in-silico study [PDF]
, 2019 In the present study, hydroxy-2-methyl-4H-pyran-4-one was isolated from the methanol root extract of Senecio laetus and was identified by FT-IR, 1H, 13C NMR and GC-MS.
Venkatesalu Venugopalan (6885626) +1 more
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Acta Crystallographica Section E: Crystallographic Communications, 2015 In the title compound, C23H14Cl4N2O7, the pyran ring has an envelope conformation with the methine C atom as the flap. The chromene rings are almost planar (r.m.s.
Rajamani Raja +3 more
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