Results 51 to 60 of about 3,012,654 (221)

Accessing Biologically Important Imines and Nitrogen Heterocycles Using an Organocatalyst

, 2022
Nitrogen-containing heterocycles play a prominent role in a variety of biological systems and drug-like molecules. Imines play an important role in the formation of these heterocycles and commercially available starting materials include alcohols and ...
Lewis, Stephonda G.
core  

Enantioselective Access to Trifluoromethylated Spirocyclopropyl Heterocycles

Advanced Science, EarlyView.
We report a rhodium‐catalyzed asymmetric [2+1] spirocyclopropanation of methylene azacycles with trifluoromethyl carbenes in situ derived from fluoroalkyl triftosylhydrazones. ABSTRACT Chiral spirocyclopropyl heterocycles have emerged as privileged three‐dimensional structural motifs in medicinal chemistry.
Yuanhao Zhu, Youzhi Xu, Weitao Zhang, Yongyue Ning, Yaojia Jiang, Yongquan Ning, Genping Huang, Jiawei Cheng, Paramasivam Sivaguru, Xihe Bi   +9 more
wiley   +1 more source

Supercapacitor Safety: Overcharge‐Induced Failure Mechanisms in Electrochemical Double‐Layer Capacitors

Advanced Science, EarlyView.
Time‐resolved synchrotron radiography reveals the internal evolution of electrochemical double‐layer capacitors under abusive overcharge. EDLCs are shown to follow a thermally driven failure pathway involving electrolyte decomposition, gas generation, and structural collapse, distinct from chemically driven thermal runaway effects of Lithium‐ion ...
Thomas Dore, Inez Kesuma, Abdus S. Ali, Jonas Pfaff, Yuxiao Jin, Rosalie Hamill, Mark Buckwell, Hamish Reid, Thomas Finco, Zeyu Sun, Yuanze Li, Sebastian Schopferer, Siegfried Nau, Nils Böttcher, Henning Markötter, Alexander J. E. Rettie, James Robinson, Paul R. Shearing, Alexander Rack, Thomas S. Miller   +19 more
wiley   +1 more source

Tailoring Structure–Property Relationships in π‐Conjugated Heterocyclic Poly(arylene alkylene) Anion‐Exchange Membranes for High‐Performance Water Electrolysis

Advanced Science, EarlyView.
From passive to active ion transport: π‐conjugated heterocycles reconfigure the hydration environment and microphase morphology of p‐terphenyl‐based anion‐exchange membranes, enabling fast hydroxide transport and high‐performance water electrolysis. ABSTRACT Anion‐exchange membrane water electrolysis (AEMWE) is a promising technology for sustainable ...
Qian Wang, Riyang Huang, Wenzhe Zhao, Si Chen, Yunpeng Guo, Yang Wu, Yun Zhao, Patric Jannasch, Jingshuai Yang   +8 more
wiley   +1 more source

Copper-Mediated monochlorination of anilines and nitrogen-containing heterocycles

, 2018
A simple and selective copper(II) chloride-mediated monochlorination of anilines and nitrogen-containing heterocycles has been developed. Stirring a mixture of aniline, copper(II) chloride, lithium chloride in EtOH under reflux condition produced 4 ...
San-Qi Zhang (2688940), Xue-Yan Yang (181280), Shuai Mao (1627021), Hong-Yi Zhao (2936910)   +3 more
core   +1 more source

Sulfur–Oxygen Competitive Coordination Allosteric Hydrogel for Triboelectric Nanogenerator‐Based Intelligent Tactile Recognition

Advanced Science, EarlyView.
A dynamic Ag+─S coordinated hydrogel with a sulfur–oxygen competitive coordination allosteric switch enables reversible tuning between soft–adhesive and stiff–robust states. Integrated with a lightweight 1DCNN classifier, the smart glove system achieves 99.70% laboratory and 93.35% real‐wear material recognition accuracy, offering a paradigm for self ...
Shixia Lan, Lin Zhang, Yunyun Dong, Yongyun Mao, Wanbiao Hu   +4 more
wiley   +1 more source

Liquid‐Responsive Shape‐Memory Nanofiber‐Reinforced Scaffolds for Cartilage Repair

Advanced Science, EarlyView.
A liquid‐responsive shape‐memory, nanofiber‐reinforced QCG scaffold combines conformal defect filling, an aligned architecture that is structurally permissive for endogenous cell infiltration, and sustained KGN release. This integrated design enhances BMSC viability, migratory activity, and chondrogenic differentiation and promotes hyaline cartilage ...
Jiyang Zeng, Wei Li, Yawei Li, Zhiming Tu, Hong Ma, Yuliang Dai, Zhaoling Ma, Tao Yuan, Bing Wang   +8 more
wiley   +1 more source

Antitumor and proliferative modulation by N- and O-heterocycles: a comprehensive review of cell growth regulation

Frontiers in Chemistry
The persistence of resistance, recurrence, and limited selectivity in cancer therapy necessitates the development of structurally advanced antitumor agents capable of modulating multiple intracellular pathways.
Nurzhan Chinibayeva, Zulfiya Unerbaeva, Daniil Shepilov, Gulzat Berganayeva, Jichang Liu, Xin Pu, Akmaral Nurmahanova, Gulbanu Zhaksylykova, Sandugash Sydykbayeva, Moldyr Dyusebaeva   +9 more
doaj   +1 more source

Benefits and applications of microwave-assisted synthesis of nitrogen containing heterocycles in medicinal chemistry

, 2020
Nitrogen containing heterocycles are of immense research interest because they are often found as naturally occurring bioactive compounds. The prominence of N-heterocycles makes it vital to develop methods to increase their synthetic efficiencies and ...
Cravotto, G., Kananda, Carl, Rotolo, Laura, Savino, Brian, Cravotto, Giancarlo, Owens, Eric A., Rotolo, L., Henary, Maged   +7 more
core   +1 more source

Unlocking Li/Mg‐Based Photochemical Nitration Platforms for Anticancer Drug Discovery

Advanced Science, EarlyView.
Two low‐toxicity light main‐group metal photochemical systems based on lithium and magnesium are constructed for selective C(sp2)‐H (di)nitration of anilines. The obtained dinitrated products exhibit anti‐HCC (hepatocellular carcinoma) and anti‐KYSE30 cell activities, holding promise as novel antitumor candidates.
Qian Wan, Jiali Zhu, Shanshuo Liu, Luchuan Ou, Huizhen Wang, Yu Lan, Zhou Dong, Yihang Bai, Wei Yang, Shihan Liu, Yan Qiao, Shi‐Jun Li, Zhigang Ren, Linbin Niu   +13 more
wiley   +1 more source