Results 51 to 60 of about 922,646 (221)

Brønsted acid-enhanced copper-catalyzed atroposelective cycloisomerization to axially chiral arylquinolizones via dearomatization of pyridine

Nature Communications, 2022
Methods to assemble axially chiral biaryl molecules with nitrogen-containing heterocycles can have implications in ligand development for homogeneous catalysis. Here the authors report enantioselective syntheses of axially chiral arylquinolizones, via an
Xiao-Long Min, Xiu-Lian Zhang, Wenbin Yi, Ying He   +3 more
doaj   +1 more source

Synthesis of nitrogen heterocycles [PDF]

, 2013
A method of synthesizing nitrogen heterocycles such as indoles, indolines, oxindoles, quinolines, isoquinolines, and isoquinolones, all of which are pharmacologically active.
Larock, Richard, Babu, Srinivasan
core  

Nickel‐Catalyzed Three‐Component Difluoroalkylation‐Amination for the Direct Access to Anti‐Inflammatory β‐Difluoroalkyl Amines

Advanced Science, EarlyView.
A nickel‐catalyzed three‐component reductive fluoroalkylation‐amination strategy of N‐vinylamides for the direct access to the α‐amidyl‐β‐difluoroalkyl amines was reported here. The synthetic method features with broad substrate scope, mild conditions, high functional group tolerance, and convenience to handle.
Chang Xu, Fangting Ma, Fan Ding, Luyan Wang, Yunxi Li, Yunzhi He, Xingang Zhang, Siyu He, Dandan Liu   +8 more
wiley   +1 more source

Activating Ionic Carbon Nitrides via Epitaxial Dyadic Coupling for Efficient Solar‐Driven H2O2 Generation

Advanced Science, EarlyView.
Epitaxial integration of a C1N1 phase onto KPHI creates a dyadic charge‐transfer nanostructure with strong interfacial electronic coupling. This architecture drives directional electron transfer from KPHI to C1N1, enabling efficient cocatalyst‐free solar H2O2 production.
Haijian Tong, Chenyan Zhao, Christian Mark Pelicano, Markus Antonietti   +3 more
wiley   +1 more source

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

Design, Synthesis, and Biological Evaluation of 4-aminoquinazoline Appended-Benzofuran Hybrids as Epidermal Growth Factor Receptor Inhibitors

Proceedings, 2019
Nitrogen-containing heterocycles such as quinazolines and benzofurans have received a great amount of interest in targeted therapies as antitumor drugs [1]. [...]
Marole Maria Maluleka, Malose Jack Mphahlele   +1 more
doaj   +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

Heterocycles. CI. Syntheses and Isomerizations of Some Allylthio Nitrogen Heterocycles [PDF]

, 1973
Allylthio nitrogen heterocycles were isomerized under the influence of base into the corresponding propenylthio analogs. Subsequently, isomerization of the resultant cis-propenylthio compounds afforded the trans-isomers.
Stanovnik, B., Kočevar, M., Tišler, M.
core  

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