Results 31 to 40 of about 13,032 (188)

Recent advances in photocatalytic hydrogen peroxide production

open access: yesPhotoMat, EarlyView., 2023
We classify the representative photocatalytic materials for photosynthesis of hydrogen peroxide (H2O2) in recent years and discuss the related modification methods in detail, providing inspiration and insights for the future design of photocatalysts for H2O2 production.
Jinyu Yan   +4 more
wiley   +1 more source

Design, Synthesis and Biological Evaluation of Novel N-Arylpiperazines Containing a 4,5-Dihydrothiazole Ring

open access: yesPharmaceuticals, 2023
Arylpiperazines represent one of the most important classes of 5-HT1AR ligands and have attracted considerable interests for their versatile properties in chemistry and pharmacology, leading to the research of new derivatives that has been focused on the
Giorgia Andreozzi   +14 more
doaj   +1 more source

CO2 Capture with Silylated Ethanolamines and Piperazines

open access: yesChemistryOpen, 2020
Invited for this month's cover is the group of Marcus Herbig from the TU Bergakademie in Freiberg. The cover picture shows the reaction of CO2 with a silyl derivative of the biogenic amine ethanolamine.
Marcus Herbig   +5 more
doaj   +2 more sources

Synthesis, and Antitumor Activity of Some N1-(Coumarin-7-yl) Amidrazones and Related Congeners

open access: yesMolecules, 2011
A series of new N1-(coumarin-7-yl)amidrazones incorporating N-piperazines and related congeners were synthesized by reacting the hydrazonoyl chloride derived from 7-amino-4-methylcoumarin with the appropriate piperazines.
Mohammad S. Mustafa   +4 more
doaj   +1 more source

Piperazine-2,3,5,6-tetraone [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2010
The mol-ecule of the title compound, C(4)H(2)N(2)O(4), is located around an inversion center and the four O atoms are in the 2,3,5,6-positions of the piperazine ring. In the crystal, bifurcated N-H⋯O hydrogen bonds link the mol-ecules into a corrugated layer parallel to (101).
Yi-Min Jiang   +4 more
openaire   +3 more sources

Research Progress on Detection of New Psychoactive Substance Piperazines in vivo

open access: yesFayixue Zazhi
Piperazines are a class of new psychoactive substances with hallucinogenic effects that affect the central nervous system by affecting the level of monoamine neurotransmitters.
LIU Jin-ting   +6 more
doaj   +1 more source

Three-Component Reaction of Diamines with Triethyl Orthoformate and Diethyl Phosphite and Anti-Proliferative and Antiosteoporotic Activities of the Products

open access: yesMolecules, 2020
A three-component reaction between diamines (diaminobenzenes, diaminocyclohexanes, and piperazines), triethyl orthoformate, and diethyl phosphite was studied in some detail.
Patrycja Petruczynik   +6 more
doaj   +1 more source

Synthesis and pharmacological evaluation of several N-(2-nitrophenyl)piperazine derivatives [PDF]

open access: yesJournal of the Serbian Chemical Society, 2007
Six newly synthesized heterocyclic (2-nitrophenyl)piperazines, with a specific structure of the heteroaryl group, whichmimics the catechol moiety of dopamine (benzimidazoles and substituted benzimidazoles), were evaluated for their binding affinity to ...
DEANA ANDRIC   +6 more
doaj   +3 more sources

Substituted Piperazines as Novel Potential Radioprotective Agents

open access: yesMolecules, 2020
The increasing risk of radiation exposure underlines the need for novel radioprotective agents. Hence, a series of novel 1-(2-hydroxyethyl)piperazine derivatives were designed and synthesized. Some of the compounds protected human cells against radiation-
Alzbeta Filipova   +15 more
doaj   +1 more source

Twelve 4-(4-methoxyphenyl)piperazin-1-ium salts containing organic anions: supramolecular assembly in one, two and three dimensions

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2019
Twelve 4-(4-methoxyphenyl)piperazin-1-ium salts containing organic anions have been prepared and structurally characterized. The monohydrated benzoate, 4-fluorobenzoate, 4-chlorobenzoate and 4-bromobenzoate salts, C11H17N2O+·C7H5O2−·H2O (I), C11H17N2O ...
Haruvegowda Kiran Kumar   +3 more
doaj   +1 more source

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