Results 1 to 10 of about 53,165 (161)

K2CO3-Promoted Formal [3+3]-Cycloaddition of N-Unsubstituted Isatin N,N′-Cyclic Azomethine Imine 1,3-Dipoles with Knoevenagel Adducts

open access: yesMolecules, 2023
The synthesis of dicyclic spiropyridazine oxoindole derivatives by using [3+3]-cycloaddition of N-unsubstituted isatin N,N′-cyclic azomethine imine 1,3-dipoles was reported.
Guosheng Yang   +9 more
doaj   +1 more source

Incorporation of Spin Labels and Paramagnetic Tags for Magnetic Resonance Studies Using Cycloaddition Reactions as a Tool

open access: yesReactions
The cycloaddition reaction is one of the most common reactions in organic chemistry. It has been applied in various fields. Herein, we focus on the application of cycloaddition reactions in investigating biological molecules and materials using magnetic ...
Amarendra Nath Maity   +2 more
doaj   +1 more source

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

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

Cycloadditions of Cyclohexynes and Cyclopentyne [PDF]

open access: yesJournal of the American Chemical Society, 2014
We report the strategic use of cyclohexyne and the more elusive intermediate, cyclopentyne, as a tool for the synthesis of new heterocyclic compounds. Experimental and computational studies of a 3-substituted cyclohexyne are also described. The observed regioselectivities are explained by the distortion/interaction model.
Medina, Jose M   +4 more
openaire   +4 more sources

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

Cycloaddition of Azosulfones and Sulfonylimines [PDF]

open access: yesAngewandte Chemie International Edition in English, 1966
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Effenberger, Franz, Maier, Roland
openaire   +3 more sources

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

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