Results 31 to 40 of about 50,209 (265)

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

Evaluating the Ability of Methyldiethanolamine/Piperazine Microemulsion in CO2 Absorption [PDF]

شیمی کاربردی روز, 2023
In this study CO2 absorption into aqueous droplets of N-methyl-diethanolamine (MDEA) in water-in-oil (w/o) and oil-in-water (o/w) emulsions were investigated in batch-stirred reactor at 298 K and different CO2 partial pressure in the range of 0.1-0.5 bar.
Masoud Nasiri, Monireh Zolfaghari, Ali Haghighi Asl   +2 more
doaj   +1 more source

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

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

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

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  

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

Synthesis of N,N‘-Orthogonally Protected (S)-Piperazine-2-carboxylic Acid

, 2016
Synthesis of N,N‘-Orthogonally Protected (S)-Piperazine-2-carboxylic ...
Teng-Man Chen (3041436), Alan M. Warshawsky (3014151), Meena V. Patel (2515885)   +2 more
core   +1 more source

Synthetic approaches to piperazine-containing drugs approved by FDA in the period of 2011–2023 [PDF]

, 2023
The piperazine moiety is often found in drugs or in bioactive molecules. This widespread presence is due to different possible roles depending on the position in the molecule and on the therapeutic class, but it also depends on the chemical reactivity of
Romanelli, Maria Novella, Manetti, Dina, Gabellini, Alessio, Maria Novella Romanelli, Dina Manetti, Teodori, Elisabetta, Elisabetta Teodori, Laura Braconi, Alessio Gabellini, Braconi, Laura, Marotta, Giambattista, Giambattista Marotta   +11 more
core   +1 more source