Results 21 to 30 of about 26,473 (143)

Crystal structure of the 4 + 2 cycloadduct of photooxidized anthracene and C60 fullerene

open access: yesActa Crystallographica Section E, 2014
The structure of the title compound, 5,6-[(1R,10S)-2,9-dioxatricyclo[8.6.03,8.011,16]hexadecane-1,10-diyl]-(C60–Ih)[5,6]fullerene methanedithione 0.1-solvate, C74H10O2·0.1CS2, has tetragonal (P42/n) symmetry at 100 K. It has a unique eight-membered ring,
Gábor Bortel   +3 more
doaj   +1 more source

A Novel Ultra-High Swelling Organogel: An Epoxy Resin Derived Gelator for Alcohols and Polar Organic Liquids [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2020
Hypothesis: Organogels are hydrophobic macromolecular networks with ability to absorb and retain organic solvents. They have been used in various applications, e.g., production of disinfectant hygienic gels used in medicine and public health. The present
Zeinab Karami   +1 more
doaj   +1 more source

Promotion mechanism of hydroxyl groups in catalyzing CO2 cycloaddition

open access: yesJournal of CO2 Utilization
In this study, a series of hydroxy-functionalized quaternary ammonium salt catalysts, i.e., NEt3(HE)Br, NEt2(HE)2Br, NEt1(HE)3Br, and N(HE)4Br, were successfully prepared by quantitatively grafting hydrogen-bond donors (HBDs) as electrophilic sites on ...
Yiming Wang   +5 more
doaj   +1 more source

Catalytic [4+2]- and [4+4]-cycloaddition using furan-fused cyclobutanone as a privileged C4 synthon

open access: yesNature Communications
Cycloaddition reactions play a pivotal role in synthetic chemistry for the direct assembly of cyclic architectures. However, hurdles remain for extending the C4 synthon to construct diverse heterocycles via programmable [4+n]-cycloaddition.
Kemiao Hong   +7 more
doaj   +1 more source

Non-K Region Disubstituted Pyrenes (1,3-, 1,6- and 1,8-) by (Hetero)Aryl Groups—Review

open access: yesMolecules, 2019
Disubstituted pyrenes at the non-K region by the same or different (hetero)aryl groups have proven to be an increasingly interesting area of research for scientists over the last decade due to their optical and photophysical properties.
Dawid Zych
doaj   +1 more source

Synthesis and Characterization of 1-Hydroxy-5-Methyltetrazole and Its Energetic Salts

open access: yesMolecules
The objective of this work was the synthesis and characterization of novel, insensitive high explosives. 1-hydroxy-5-methyltetrazole served as both a scaffold and anion for preparing various nitrogen-rich energetic salts. The compounds were characterized
Lukas J. Eberhardt   +3 more
doaj   +1 more source

Ferrocenyl Substituted Stannanethione and Stannaneselone

open access: yesMolecules
Heavier element analogues of a ketone, a C=O double-bond compound, have been fascinating compounds from the viewpoint of main-group element chemistry because of their unique structural features and reactivity as compared with those of a ketone, which ...
Keisuke Iijima   +2 more
doaj   +1 more source

The Theoretical and Experimental Study of DiazomethaneStyrene [3+2]-Cycloadditions

open access: yesЖурнал органічної та фармацевтичної хімії
Pyrazolines are an important class of heterocyclic compounds known for their biological activities, making them attractive objects for medicinal chemistry.
Serhii I. Shuvakin, Serhii P. Ivonin
doaj   +1 more source

Trifluoromethylated Flavonoid-Based Isoxazoles as Antidiabetic and Anti-Obesity Agents: Synthesis, In Vitro α-Amylase Inhibitory Activity, Molecular Docking and Structure–Activity Relationship Analysis

open access: yesMolecules, 2021
Diabetes mellitus is a major health problem globally. The management of carbohydrate digestion provides an alternative treatment. Flavonoids constitute the largest group of polyphenolic compounds, produced by plants widely consumed as food and/or used ...
Faisal K. Algethami   +6 more
doaj   +1 more source

Thermally Induced Intramolecular Diels–Alder Reaction of Furan-Tethered Methylenecyclopropanes

open access: yesMolecules
The substantial ring strain and activated double bonds render methylenecyclopropanes (MCPs) potential substrates for Diels–Alder (DA) reactions. In this work, we present a thermally induced intramolecular Diels–Alder (IMDA) reaction utilizing furan ...
Qi-Yun Huang   +3 more
doaj   +1 more source

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