Results 41 to 50 of about 37,689 (286)

Synthesis and Molecular Structure of tert-Butyl 4-(2-tert-butoxy-2-oxoethyl)piperazine-1-carboxylate

open access: yesCrystals, 2012
The crystal and molecular structure of tert-butyl 4-(2-tert-butoxy-2-oxoethyl)-piperazine-1-carboxylate is reported. The title compound crystallizes from a petroleum ether/ethyl acetate mixture in the monoclinic space group P 21/c with four molecules in ...
Martin Köckerling   +2 more
doaj   +1 more source

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

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2020
Three salts containing the 4-(4-fluorophenyl)piperazin-1-ium cation have been prepared and structurally characterized. In 4-(4-fluorophenyl)piperazin-1-ium 2-hydroxy-3,5-dinitrobenzoate, C10H14FN2+·C7H3N2O7−, (I), the anion contains an intramolecular O—H.
Chayanna Harish Chinthal   +4 more
doaj   +1 more source

Three closely related 1-[(1,3-benzodioxol-5-yl)methyl]-4-(halobenzoyl)piperazines: similar molecular structures but different intermolecular interactions

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2019
In each of the compounds 1-[(1,3-benzodioxol-5-yl)methyl]-4-(3-fluorobenzoyl)piperazine, C19H19FN2O3 (I), 1-[(1,3-benzodioxol-5-yl)methyl]-4-(2,6-difluorobenzoyl)piperazine, C19H18F2N2O3 (II), and 1-[(1,3-benzodioxol-5-yl)methyl]-4-(2,4-dichlorobenzoyl ...
Ninganayaka Mahesha   +6 more
doaj   +1 more source

SnAP Reagents for the Synthesis of Piperazines and Morpholines

open access: yes, 2016
Substituted piperazines and morpholines are valuable structural motifs in biologically active compounds, but are not easily prepared by contemporary cross-coupling approaches. In this report, we introduce SnAP reagents for the transformation of aldehydes
Cam-Van T. Vo (1843522)   +2 more
core   +2 more sources

Six 1-aroyl-4-(4-methoxyphenyl)piperazines: similar molecular structures but different patterns of supramolecular assembly

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2019
Six new 1-aroyl-4-(4-methoxyphenyl)piperazines have been prepared, using coupling reactions between benzoic acids and N-(4-methoxyphenyl)piperazine.
Haruvegowda Kiran Kumar   +4 more
doaj   +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

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

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

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