Results 51 to 60 of about 50,209 (265)

Hydrogen‐Bonding Order Associated With Radical Delocalization in Layered Organic Cathode Materials

Angewandte Chemie, EarlyView.
“TAQ” and TAPT share the same pyrazine‐based molecular structure but differ in degree of crystallinity. Combined x‐ray scattering, solid‐state NMR, MicroED, and EPR reveal that “TAQ”'s higher crystallinity and ordered hydrogen‐bonding network are associated with enhanced radical delocalization and conductivity, highlighting structural order as a design
Alae Eddine Lakraychi, Zeqian Zhang, Oliver Lin, Eric D Walter, Jiaqi Wang, Harshan Reddy Gopidi, Eliot F. Woods, Ruozhu Feng, Wei Wang, Pieremanuele Canepa, Brett A. Helms, Kamila M. Wiaderek, Qian Chen, Yan Yao, Ying Chen   +14 more
wiley   +2 more sources

A comprehensive review on the synthesis of substituted piperazine and its novel bio-medicinal applications

Chemistry of Inorganic Materials
Piperazine is two nitrogen containing heterocyclic compound. The fundamental activity of the piperazine is due to the 1,4-position of nitrogen atoms and their substitutions. The SN1 reaction is followed by the others alkylation and substitution reactions.
Muhammad Rizwan, Sobia Noreen, Sadia Asim, Zohaib Liaqat, Musrat Shaheen, Hina Ibrahim   +5 more
doaj   +1 more source

Crystal structure of 3-{[4-(2-methoxyphenyl)piperazin-1-yl]methyl}-5-(thiophen-2-yl)-1,3,4-oxadiazole-2(3H)-thione

Acta Crystallographica Section E: Crystallographic Communications, 2016
The title compound, C18H20N4O2S2, is a new 1,3,4-oxadiazole and a key pharmacophore of several biologically active agents. It is composed of a methyl(thiophen-2-yl)-1,3,4-oxadiazole-2(3H)-thione moiety linked to a 2-methoxyphenyl unit via a piperazine ...
Monirah A. Al-Alshaikh, Hatem A. Abuelizz, Ali A. El-Emam, Mohammed S. M. Abdelbaky, Santiago Garcia-Granda   +4 more
doaj   +1 more source

A Small‐Molecule DEPTAC Rescues Cognitive Deficits by Targeted Dephosphorylation of Pathological Tau

Advanced Science, EarlyView.
TP2 is a fully synthetic small‐molecule dephosphorylation‐targeting chimera that recruits endogenous PP2A‐Bα to Tau, enabling targeted removal of pathological phosphate modifications. In two tauopathy mouse models, systemic TP2 reduces Tau pathology, preserves neuronal and synaptic integrity, improves neuroimmune homeostasis, and rescues cognition ...
Fei Sun, Yang Liu, Qiuzhi Zhou, Qingyuan Hu, Weixia Wang, Yue Xiao, Jingfen Su, Guanting Liu, Miaomiao Sun, Lixia Chen, Hua Li, Ying Yang, Jian‐Zhi Wang   +12 more
wiley   +1 more source

Chlorination‐Driven BODIPY Fluorescent Probes for the Selective Monitoring of Myeloperoxidase Activity in Cells and Inflamed Mouse Models

Angewandte Chemie, EarlyView.
A meso‐carboxamide‐substituted BODIPY fluorescent probe reports myeloperoxidase (MPO) activity via electrophilic chlorination by MPO‐derived HOCl, generating a highly emissive chlorinated product with a ca. 40 nm bathochromic shift. Applications in quantitative MPO assays, cellular imaging of MPO‐derived HOCl, redox‐dependent discrimination of cancer ...
Siyoung Cho, Yongyang Luo, Jeehyeon Bae, Youngmi Kim   +3 more
wiley   +2 more sources

Precise Control of Charge–Structure Coupling in Polyamide Membranes for Mono‐ and Divalent Ion Separation

Advanced Science, EarlyView.
A zwitterionic copolymer, Poly(2‐methacryloyloxyethyl phosphorylcholine‐co‐2‐aminoethyl methacrylate hydrochloride) (P(MPC‐co‐AEMA)) copolymers, with tunable MPC/AEMA ratios, is grafted onto the polyamide (PA) selective layer via secondary interfacial polymerization. Balancing reactive anchoring segments (AEMA) and zwitterionic segments (MPC) regulated
Shaofan Duan, Shuai Jiang, Feidong Yang, Yuxuan Feng, Yongxuan Shi, Pengfei Zhang, Mengyang Hu, Yuqing Lin, Tae Hoon Lee, Kecheng Guan, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama, Eiji Kamio   +13 more
wiley   +1 more source

Engineering Rapid Payload Release Rate in 1,6‐Elimination Processes of Self‐Immolative Linkers

Angewandte Chemie, EarlyView.
The payload release rate of self‐immolative linkers was greatly improved through stabilization of an intermediate carbocation, thereby achieving an up to 10 000‐fold improvement in rate constant. Furthermore, lipophilicity was identified as another factor that affects the release rate. This new strategy is applicable to different payloads and different
Albert Marten Schulte, Gülbahar Bozan, Francesca Amoroso, Bart Cornelissen, Wiktor Szymanski   +4 more
wiley   +2 more sources

Investigation of piperazines as human carbonic anhydrase I, II, IV and VII activators

Journal of Enzyme Inhibition and Medicinal Chemistry, 2018
Four human (h) carbonic anhydrase isoforms (CA, EC 4.2.1.1), hCA I, II, IV, and VII, were investigated for their activation profile with piperazines belonging to various classes, such as N-aryl-, N-alkyl-, N-acyl-piperazines as well as 2,4-disubstituted ...
Andrea Angeli, Niccolò Chiaramonte, Dina Manetti, Maria Novella Romanelli, Claudiu T. Supuran   +4 more
doaj   +1 more source

The crystal structures, Hirshfeld surface analyses and energy frameworks of 8-{1-[3-(cyclopent-1-en-1-yl)benzyl]piperidin-4-yl}-2-methoxyquinoline and 8-{4-[3-(cyclopent-1-en-1-yl)benzyl]piperazin-1-yl}-2-methoxyquinoline

Acta Crystallographica Section E: Crystallographic Communications, 2021
The title compounds, 8-{1-[3-(cyclopent-1-en-1-yl)benzyl]piperidin-4-yl}-2-methoxyquinoline, C27H30N2O (I), and 8-{4-[3-(cyclopent-1-en-1-yl)benzyl]piperazin-1-yl}-2-methoxyquinoline, C26H29N3O (II), differ only in the nature of the central six-membered ...
Nisar Ullah, Helen Stoeckli-Evans
doaj   +1 more source

A Review on Analytical Methods for Piperazine Determination [PDF]

, 2022
Piperazine compounds mediate their anthelmintic action by generally paralyzing parasites, allowing the host body to easily remove or expel the invading organism. It is an anthelmintic drug in human as well as in veterinary medicine.
Al-Neaimy, Usra Ibrahim Saeed, Shehab, Sahar Mahmood, Saeed, Zainab Faiyq   +2 more
core   +1 more source