Results 81 to 90 of about 40,506 (345)

Radical‐Polar Crossover Bicyclization Enables a Modular Synthesis of Saturated Bicyclic Amines

Advanced Science, EarlyView.
Herein, we report the successful realization of a radical‐polar crossover bicyclization reaction from easily available cyclopropylamines and substituted alkenes through photoredox catalysis. This approach introduces an innovative methodology for the de novo synthesis of a diverse collection of 4/5‐, 5/5‐, 6/5‐,7/5‐ and 5/6‐fused saturated bicyclic ...
Dewei Feng, Xiao Geng, Lingling Zuo, Zhifang Li, Lei Wang   +4 more
wiley   +1 more source

A Universal Approach to Anchoring Chromophores onto Magnetic Scaffold for Achieving Easily Recyclable Heterogeneous Photocatalytic Systems

Advanced Science, EarlyView.
The practical application of chromophores such as porphyrins, coumarins, anthraquinones, and pyrene derivatives in photocatalysis is severely limited by catalyst stability and reusability. In this work, a simple and universal strategy is presented for preparing highly efficient and recyclable heterogeneous photocatalysts for the oxidative coupling of ...
Xuan Zhan, Yikun Wang, Chenyang Sun, Yuchen Fang, Lihua Huang, Zakir Ullah, Qiang Chen, Xuejing Wang, Zheng Xing, Gangfeng Ouyang   +9 more
wiley   +1 more source

High‐Throughput Tiling of Essential mRNAs Increases Potency of Antisense Antibiotics

Advanced Science, EarlyView.
The systematic tiling of essential genes’ mRNA here presented, proposes a valuable tool for the identification of novel PNA sequences with antibiotic potential. The high‐throughput synthetic set up opens the door to investigating thousands of sequences in an economic way and ultimately identifies potent antisense oligonucleotides while also giving room
Giorgia Danti, Linda Popella, Jörg Vogel, Hans M. Maric   +3 more
wiley   +1 more source

SnAP-eX Reagents for the Synthesis of Exocyclic 3-Amino- and 3-Alkoxypyrrolidines and Piperidines from Aldehydes.

Organic Letters, 2016
SnAP-eX (tin amine protocol, exocyclic heteroatoms) reagents allow the single-step transformation of aldehydes and ketones into 2,3-disubstituted pyrrolidines and piperidines containing exocyclic amine or alkoxy groups. These saturated N-heterocycles are
Michael U Luescher, J. Bode
semanticscholar   +1 more source

Tuning the Performance of Poly(quaterphenyl piperidinium) Anion‐Exchange Membranes by Monomer Configuration

Advanced Energy Materials, EarlyView.
Ether‐free poly(quaterphenyl piperidinium) ionomers are prepared by superacid‐mediated polyhydroxyalkylations and explored as hydroxide conducting membranes. The para‐meta configuration of the quaterphenyl monomer greatly influences polymer backbone flexibility.
Pegah Mansouri Bakvand, Dong Pan, Andrit Allushi, Patric Jannasch   +3 more
wiley   +1 more source

Achieving High Energy Density in Aqueous Zinc‐Ion Batteries

Advanced Energy Materials, EarlyView.
Aqueous zinc‐ion batteries (AZIBs) offer high safety, cost‐effectiveness, and environmental benefits, yet achieving high energy density remains a challenge. This review explores advances in cathodes, zinc anodes, separators, and electrolytes to enhance energy density. It also discusses scalability and future directions, highlighting AZIBs potential for
Chun‐Chuan Kao, Chao Ye, Junnan Hao, Yujie Chen, Shao‐Jian Zhang, Shi‐Zhang Qiao   +5 more
wiley   +1 more source

Prins fluorination cyclisations: Preparation of 4-fluoro-pyran and -piperidine heterocycles

Beilstein Journal of Organic Chemistry, 2010
The Prins reaction was investigated using BF3·OEt2 as a Lewis acid. It has been recently demonstrated, that if BF3·OEt2 is used in stoichiometric amounts then these reactions generate fluorinated products where the BF3·OEt2 contributes fluoride ion to ...
Guillaume G. Launay, Alexandra M. Z. Slawin, David O'Hagan   +2 more
doaj   +1 more source

Pentannulation of N-heterocycles by a tandem gold-catalyzed [3,3]-rearrangement/Nazarov reaction of propargyl ester derivatives: a computational study on the crucial role of the nitrogen atom

Beilstein Journal of Organic Chemistry, 2020
The tandem gold(I)-catalyzed rearrangement/Nazarov reaction of enynyl acetates in which the double bond is embedded in a piperidine ring was computationally and experimentally studied.
Giovanna Zanella, Martina Petrović, Dina Scarpi, Ernesto G. Occhiato, Enrique Gómez-Bengoa   +4 more
doaj   +1 more source

Visible‐Light‐Driven Multifunctional Luminogens With More Than 150 Nm Absorption Band Separation for Dynamic Information Encryption

Aggregate, EarlyView.
A series of stimuli‐responsive molecular photoswitches featuring near‐infrared second aggregation‐induced emission (AIE) and impressive acid/base‐driven switching are constructed and molecular logic gate applications are realized. ABSTRACT Information security protection has become a fundamental issue in the human life, national security, and social ...
Shijie Zhen, Fayun Ma, Hong Chen, Lin Li, Meijing Li, Zujin Zhao, Ben Zhong Tang   +6 more
wiley   +1 more source

Engineering Bodipy‐Based Metal–Organic Frameworks for Efficient Full‐Spectrum Photocatalysis in Amide Synthesis

Angewandte Chemie, EarlyView.
Three highly stable bodipy‐based metal–organic frameworks (BMOFs) were synthesized by treating dicarboxyl‐functionalized bodipy ligands with Zr‐oxo clusters. Featuring the distinct bodipy scaffold in the framework, these BMOFs displayed high reactivity in heterogenous photocatalytic C─H bond activation of N,N‐dimethylanilines to access amides under ...
Binhui Liu, Xu Chen, Yuhao Yang, Mohammad Reza Alizadeh Kiapi, Dhruv Menon, Qianyi Zhao, Guozan Yuan, Luke L. Keenan, David Fairen‐Jimenez, Qingchun Xia   +9 more
wiley   +2 more sources