Results 11 to 20 of about 6,059 (251)

o-Benzoquinone dioxime [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2010
The title compound, C(6)H(6)N(2)O(2), was obtained as a product of an in vitro study of the metabolism of benzofuroxan. The molecule exhibits a amphi configuration of the oxime groups C=N-OH. One oxime group is involved in the formation of a strong intra-molecular O-H⋯N hydrogen bond, while another links mol-ecules into zigzag chains along the c axis ...
Gervasio Giuliana   +2 more
openaire   +3 more sources

Application of the Meerwein reaction of 1,4-benzoquinone to a metal-free synthesis of benzofuropyridine analogues

open access: yesBeilstein Journal of Organic Chemistry, 2021
Several new heterocyclic systems based on a hydroxybenzofuro[2,3-b]pyridine building block were prepared. This benzofuropyridine is easily available from the Meerwein reaction of benzoquinone and a heterocyclic diazonium salt, followed by reduction and ...
Rashmi Singh   +4 more
doaj   +1 more source

Neuroprotective effect and mechanism of idebenone on hippocampal damage induced by epileptic seizure

open access: yesChinese Journal of Contemporary Neurology and Neurosurgery, 2022
Objective To investigate the protective effect of idebenone (IDBN) on hippocampal neuron injury in epileptic rats and its mechanism. Methods Forty-eight Wistar rats were randomly divided into normal control group, IDBN prevention group (prevention group),
QIAO Shan   +5 more
doaj   +1 more source

Anticancer activity and toxicity of new quaternary ammonium geldanamycin derivative salts and their mixtures with potentiators

open access: yesJournal of Enzyme Inhibition and Medicinal Chemistry, 2021
Geldanamycin (GDM) has been modified by different type neutral/acidic/basic substituents (1–7) and by quinuclidine motif (8), transformed into ammonium salts (9–13) at C(17).
Natalia Skrzypczak   +8 more
doaj   +1 more source

Harvestman Phenols and Benzoquinones: Characterisation and Biosynthetic Pathway

open access: yesMolecules, 2013
Benzoquinones are usually present in arthropod defence exudates. Here, we describe the chemical profiles of 12 harvestman species belonging to the neotropical family Gonyleptidae.
Glauco Machado   +5 more
doaj   +1 more source

Effects of Benzoquinones on Radicles of Orobanche and Phelipanche Species

open access: yesPlants, 2021
The holoparasitic broomrape weeds (Orobanche and Phelipanche species) cause severe yield losses throughout North Africa, the Middle East, and Southern and Eastern Europe. These parasitic weeds form an haustorium at the tip of their radicles to infect the
Mónica Fernández-Aparicio   +3 more
doaj   +1 more source

Novel Anti-Aging Benzoquinone Derivatives from Onosma bracteatum Wall

open access: yesMolecules, 2019
The aim of this study was to investigate anti-aging molecules from Onosma bracteatum Wall, a traditional medicinal plant used in the Unani and Ayurvedic systems of medicine. During bioassay-guided isolation, two known benzoquinones, allomicrophyllone (1)
Umer Farooq   +3 more
doaj   +1 more source

A Model for Phylogenetic Chemosystematics: Evolutionary History of Quinones in the Scent Gland Secretions of Harvestmen

open access: yesFrontiers in Ecology and Evolution, 2017
By the possession of unique exocrine scent glands, Opiliones (harvestmen) arise as a perfect model for studies on the evolutionary history of secretion chemistry.
Günther Raspotnig   +5 more
doaj   +1 more source

Regioselectivity of conjugate additions to monoalkyl-1,4-benzoquinones [PDF]

open access: yesJournal of the Serbian Chemical Society, 2002
The regioselectivity of the reaction of conjugate addition of thiols, amines, methanol and hydrogen chloride with the monoalkyl-1,4-benzoquinones avarone and 2-tert-butyl-1,4-benzoquinone was investigated.
SNEZANA TRIFUNOVIC   +5 more
doaj   +3 more sources

Metal-Free Aminohalogenation of Quinones With Alkylamines and NXS at Room Temperature

open access: yesFrontiers in Chemistry, 2022
A simple and practical strategy for intermolecular aminohalogenation of quinone with alkyl amines and NXS was developed, in which haloamines generated in situ were employed as bifunctional reagents.
Jia Li, Yu-An Li, Ge Wu, Xu Zhang
doaj   +1 more source

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