Results 71 to 80 of about 14,956 (188)

Interaction mechanisms and structural properties of B-, Si-doped C60 fullerenes with 1-formylpiperazine

Main Group Metal Chemistry, 2016
Piperazines and fullerene nanocages are versatile compounds. These are discussed in a wide range of academic work, especially in the field of medicine, and considered for various applications by the pharmaceutical industry.
Parlak Cemal, Alver Özgür, Ramasami Ponnadurai   +2 more
doaj   +1 more source

Reactions between Grignard reagents and heterocyclic N-oxides: Stereoselective synthesis of substituted pyridines, piperidines, and piperazines

, 2011
In this perspective we discuss the recent developments of stereoselective synthesis of substituted pyridines, piperidines, and piperazines from cheap and commercially readily available starting materials.
Roger Olsson, Fredrik Almqvist, Olsson, Roger, Almqvist, Fredrik,, Hans Andersson, Andersson, Hans,   +5 more
core   +1 more source

Synthesis of N‑Pyrrolyl(furanyl)-Substituted Piperazines, 1,4-Dizepanes, and 1,4-Diazocanes

, 2019
The synthetic potential of 5-bromo-1,1,1-trifluoro-4-methoxypent-3-en-2-one toward the catalyst-free synthesis of N-pyrrolyl­(furanyl)-piperazines, 1,4-diazepanes, and 1,4-diazocanes through a telescoped protocol is reported. This three-component one-pot
Lucimara L. Zachow, Clarissa P. Frizzo (1457206), Marcos A. P. Martins, Nilo Zanatta, Helio G. Bonacorso (1457209), Marcos A. P. Martins (1457212), Mateus Mittersteiner (6899375), Clarissa P. Frizzo, Mateus Mittersteiner, Lucimara L. Zachow (3341348), Valquiria P. Andrade, Valquiria P. Andrade (6899378), Helio G. Bonacorso, Nilo Zanatta (1457224)   +13 more
core   +2 more sources

Stereospecific Ring Opening and Cycloisomerization of Aziridines with Propargylamines: Synthesis of Functionalized Piperazines and Tetrahydropyrazines

, 2018
Stereospecific Cu-catalyzed nucleophilic ring opening of N-sulfonylaziridines with propargylamines and subsequent hydroamination afford piperazines, which leads to double-bond isomerization to furnish tetrahydro­pyrazines. Optically active aziridines can
Tharmalingam Punniyamurthy (1490761), Bijay Ketan Das (5519159), Sourav Pradhan (3814492)   +2 more
core   +1 more source

Synthesis and Antimicrobial Activity of N-[α-(Phenoxy/Substituted-phenoxy)acetyl/propionyl]piperazines/morpholines

, 1992
Department of Chemistry, Dr. Harisingh Gour Vishwavidyalaya, Sagar-470 003 Manuscript received 27 May 1991, revised 21 November 1991, accepted 6 January 1992 Synthesis and Antimicrobial Activity of N-[α-(Phenoxy/Substituted-phenoxy)acetyl/propionyl ...
SAVITRI D. SRIVASTAVA, SUNITA CHAURASIA
core   +1 more source

Synthesis of [1,2,4]Triazolo[4,3-α]piperazines via Highly Reactive Chloromethyloxadiazoles

, 2016
A concise, modular approach for the synthesis of [1,2,4]triazolo[4,3-α]piperazines via condensation of highly reactive chloromethyloxadiazoles with ethylenediamines is described.
Karl Hansen (2221882), Michele Kubryk (1660960), Joseph D. Armstrong (2366482), Jaume Balsells (1458115), Lisa DiMichele (2023210), Jinchu Liu (2169022)   +5 more
core   +1 more source

Reactions of copper(II) quinaldinate with selected piperazines

, 2022
Narejene so bile reakcije med bakrovim(II) kinaldinatom in piperazini: 1-metilpiperazinom, 1-etilpiperazinom, 1-(2-hidroksietil)piperazinom in samim piperazinom.
Marc, Živana
core  

Synthesis, Dynamic NMR Characterization, and XRD Study of 2,4-Difluorobenzoyl-Substituted Piperazines

Chemistry
Five different 2,4-difluorobenzamide derivatives were synthesized and fully characterized by 1H/13C/19F/2D NMR spectroscopy using DMSO-d6 as solvent and MS.
Martin Köckerling, Constantin Mamat
doaj   +1 more source

Enantioselective Synthesis of α-Secondary and α-Tertiary Piperazin-2-ones and Piperazines by Catalytic Asymmetric Allylic Alkylation [PDF]

, 2015
The asymmetric palladium-catalyzed decarboxylative allylic alkylation of differentially N-protected piperazin-2-ones allows the synthesis of a variety of highly enantioenriched tertiary piperazine-2-ones.
Horne, David, Eidamshaus, Christian, Nam, Sangkil, Stoltz, Brian M., Korch, Katerina M., Behenna, Douglas C.   +5 more
core  

Selective, Catalytic, and Dual C(sp³)–H Oxidation of Piperazines and Morpholines under Transition-Metal-Free Conditions

, 2018
By using cheap and innocuous reagents, such as NaClO2, NaOCl, and catalytic amounts of TEMPO, a new environmentally friendly protocol for the selective and catalytic TEMPO C­(sp3)–H oxidation of piperazines and morpholines to 2,3-diketopiperazines (2,3 ...
Luís Hernández-García (6028715), Delfino Chamorro-Arenas (3103788), Urbano Osorio-Nieto (3103791), Fernando Sartillo-Piscil (1608286), Leticia Quintero (1608283)   +4 more
core   +1 more source