Results 31 to 40 of about 49,138 (272)

Rearrangement of Imidazolidine to Piperazine Rings in the Presence of Dy^III

Chemistry Proceedings, 2022
The formation of imidazolidines from secondary amines and aldehydes is well known. This small cycle can act as a nitrogen donor, and it is usually stable when it coordinates to metal ions.
Julio Corredoira-Vázquez, Paula Oreiro-Martínez, Ana M. García Deibe, Jesús Sanmartín-Matalobos, Matilde Fondo   +4 more
doaj   +1 more source

Piperazine and Morpholine Protoporphyrin IX Derivatives Intensify Biomolecules Oxidation and Phototoxicity in Triple-Negative Breast Cancer. [PDF]

ChemMedChem
Protoporphyrin IX derivatives bearing piperazine or morpholine substituents exhibit enhanced cellular retention and photodynamic activity in triple‐negative breast cancer cells. Structural modification promotes oxidative stress, alters mitochondrial membrane potential, and increases caspase‐3 activity, providing new structure–activity relationship ...
Franco MDS, Lapierre TJWJD, Mendonça TP, Peixoto LFF, Teixeira RR, Guerra JFDC, Tudini KAGY, Ribeiro DL, Espindola FS, Justino AB, Rezende Júnior CO, Tsubone TM.   +11 more
europepmc   +2 more sources

Recent research progress and outlook on the bioactivities and mechanism of piperazine pesticides

Journal of Integrative Agriculture
Piperazine is a nitrogen-containing heterocyclic compound that is commonly used as an intermediate linking group in the structural derivation of compounds.
Yanju Wang, Baoan Song
doaj   +1 more source

Substanţele psihoactive noi şi riscurile consumului la copii şi adolescenţi [PDF]

Romanian Journal of Pediatrics, 2019
Conform definiției stabilite de Monitorul European pentru Droguri şi Toxicomanie (European Monitoring Centre for Drugs and Drug Addiction – EMCDDA), o „substanță psihoactivă nouă este considerată orice substanță narcotică sau psihotropă în formă pură sau
Viorela Nițescu
doaj   +1 more source

Piperazine-Grafted Magnetic Reduced Graphene Oxide (Fe₃O₄@rGO-NH) as a Reusable Heterogeneous Catalyst for Gewald Three-Component Reaction

, 2020
In recent years, interesting physical and chemical properties of graphene oxide (GO) have led to a great deal of excitement in the chemistry. One of the most promising results is the use of GO and the functionalized GOs as heterogeneous catalysts in ...
Behrooz Maleki (3610853), Morteza Bakhshi-Noroozi (8392329), Esmail Rezaei-Seresht (8392326)   +2 more
core   +1 more source

The crystal structures of two new coumarin derivatives: 2-(4-{2-[(2-oxo-2H-chromen-4-yl)oxy]acetyl}piperazin-1-yl)acetamide and N-(2,4-dimethoxybenzyl)-2-[(2-oxo-2H-chromen-4-yl)oxy]acetamide

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compounds, 2-(4-{2-[(2-oxo-2H-chromen-4-yl)oxy]acetyl}piperazin-1-yl)acetamide, C17H19N3O5, (I), and N-(2,4-dimethoxybenzyl)-2-[(2-oxo-2H-chromen-4-yl)oxy]acetamide, C20H19NO6, (II), are new coumarin derivatives.
S. Syed Abuthahir, M. NizamMohideen, V. Viswanathan, M. Govindhan, K. Subramanian   +4 more
doaj   +1 more source

Stable Zr-Piperazine MOFs for Efficient Gold Recovery [PDF]

Gold's importance in various industries, the ever-rising demand of electronics and shrinking gold reserves all underscore the pressing need to develop effective gold recovery methods from waste.
Belin, Anne Faustine Sido, Roth, Jocelyn Richard, Meoli, Matthieu, Scopelliti, Rosario, Queen, Wendy Lee, Stoian, Dragos   +5 more
core   +1 more source

Recent advances in photocatalytic hydrogen peroxide production

PhotoMat, 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, Yuan Li, Yunxiang Li, Shuxin Ouyang, Tierui Zhang   +4 more
wiley   +1 more source

Piperazine-functionalized porous anion exchange membranes for efficient acid recovery by diffusion dialysis

, 2022
Piperazine-functionalized porous anion exchange membranes for efficient acid recovery by diffusion ...
S Pan (13147035), J Chen (80904), X You (11796512), Shuaifei Zhao (13094592), G Lu (7647290), L Teng (13354509), X Lin (7714988), J Lin (6951434)   +7 more
core  

Synthesis and Antimicrobial Activity of Some New Piperazine Derivaties Containing Aryl Sulfonyloxy Group

E-Journal of Chemistry, 2004
Novel N-substituted piperazine derivatives containing sulfonyloxy aniline moiety have been prepared. The various 4-sulfonyloxy aniline (SA) derivatives (2a-h) have been prepared by the condensation reaction of N-Acetyl Sulfanilyl chloride (ASC) and ...
H. S. Patel, H. D. Desai, H. J. Mistry
doaj   +1 more source