Results 61 to 70 of about 597,754 (265)

C(aryl)-O Bond Formation from Aryl Methanesulfonates via Consecutive Deprotection and SNAr Reactions with Aryl Halides in an Ionic Liquid

Molecules, 2007
An efficient K3PO4-mediated synthesis of unsymmetrical diaryl ethers using the ionic liquid [Bmim]BF4 (1-butyl-3-methylimidazolium tetrafluoroborate) as solvent has been developed.
Hui Xu, Yang Chen
doaj   +1 more source

Cobalt/Photoredox Catalyzed Desymmetrization of Oxo and Azabicycles via Asymmetric Reductive Coupling With Alkynes

Advanced Science, EarlyView.
A one‐step, asymmetric reductive coupling of alkynes and oxa‐ and aza‐bicyclic olefins using a cobalt/photoredox catalytic system through desymmetrization. ABSTRACT Bicyclo[2.2.1]heptane frameworks represent a privileged structural motif prevalent in numerous natural products and bioactive molecules.
Subhankar Pradhan, Arko Saha, Bholanath Maity, Sayan Dutta, Luigi Cavallo, Basker Sundararaju   +5 more
wiley   +1 more source

Synthesis of Novel Fluorescent Sensors Based on Naphthalimide Fluorophores for the Highly Selective Hg2+-Sensing

Journal of Chemistry, 2015
With an aim to develop the new sensors for optical detection of Hg2+ ions, two novel fluorometric sensors were designed and successfully prepared using 2-(3-(2-aminoethylsulfanyl)propylsulfanyl)ethanamine and one or two N-methylnaphthalimide moieties (1 ...
Yordkhuan Tachapermpon, Pornthip Piyanuch, Narupon Prapawattanapol, Kanjarat Sukrat, Kullatat Suwatpipat, Nantanit Wanichacheva   +5 more
doaj   +1 more source

Base-Promoted S_NAr Reactions of Fluoro- and Chloroarenes as a Route to N-Aryl Indoles and Carbazoles

Molecules, 2019
KOH/DMSO-promoted C-N bond formation via nucleophilic aromatic substitution (SNAr) between chloroarenes or fluoroarenes with indoles and carbazole under transition metal-free conditions affording the corresponding N-arylated indoles and carbazoles has ...
Muhammad Asif Iqbal, Hina Mehmood, Jiaying Lv, Ruimao Hua   +3 more
doaj   +1 more source

Nucleophilic Aromatic Substitution Reactions of Novel 5-(2-Methoxyphenyl)tetrazole Derivatives with Organolithium Reagents

, 2016
Nucleophilic Aromatic Substitution Reactions of Novel 5-(2-Methoxyphenyl)tetrazole Derivatives with Organolithium ...
Aaron E. Bunnell (3042465), S. Russell Stabler (3048654), Derek P. G. Norman (2947464), Lee A. Flippin (506350)   +3 more
core   +2 more sources

Nano‐Backpack Engineered Probiotics with Reactive Oxygen Species–Responsive Tungsten Release for Synergistic Therapy of Inflammatory Bowel Disease

Advanced Science, EarlyView.
An integrated probiotic system is engineered to execute a programmed therapeutic cascade against inflammatory bowel disease. Upon pathological signals, the system sequentially performs ROS scavenging, tungsten release, and selective pathogen suppression, thereby breaking the oxidative stress–dysbiosis cycle to remodel gut microbiota and reinforce ...
Yang Yang, Liucan Wang, Guoqing Chen, Yuanling Zhang, Jiarui Shi, Wenzhe Fan, Min Yu, Jixi Zhang, Hua Yang   +8 more
wiley   +1 more source

NGHIÊN CỨU TỔNG HỢP DẪN XUẤT QUINOLINECARBOXAMIDE VÀ THỬ NGHIỆM HOẠT TÍNH SINH HỌC

Tạp chí Khoa học Đại học Cần Thơ, 2014
Trong nghiên cứu này, hai dẫn xuất quinolinecarboxamide là N-(2-(7-chloro-quinolin-4-ylamino)ethyl)acetamide (5) và N-(2-(7-chloroquinolin-4-ylamino)ethyl)benz-amide (8) đã được tổng hợp thành công từ tác chất ban đầu là 4,7-dichloroquinoline.
Trần Thị Thùy Dương, Nguyễn Hoàng Sơn, Bùi Thị Bửu Huê   +2 more
doaj  

Syntheses of fluorooxindole and 2-fluoro-2-arylacetic acid derivatives from diethyl 2-fluoromalonate ester

Beilstein Journal of Organic Chemistry, 2014
Diethyl 2-fluoromalonate ester is utilised as a building block for the synthesis of 2-fluoro-2-arylacetic acid and fluorooxindole derivatives by a strategy involving nucleophilic aromatic substitution reactions with ortho-fluoronitrobenzene substrates ...
Antal Harsanyi, Graham Sandford, Dmitri S. Yufit, Judith A.K. Howard   +3 more
doaj   +1 more source

Molecularly Engineered Wing‐Shaped Azobenzene Memristors for Logic‐in‐Memory and Edge Visual Intelligence

Advanced Science, EarlyView.
Rational engineering of terminal substituents in symmetric azobenzene‐based molecules enables precise control over conformationally coupled charge‐transfer processes. This design yields tunable nonvolatile resistive memory behaviors, ranging from write‐once‐read‐many‐times (WORM) to rewritable switching.
Yanze Liu, Tao Han, Jiahui Ding, Hong Lian, Lingling Yao, Zhaoxin Xu, Xingyu Zhang, Shuanglong Wang, Jiangnan Xia, Tianchi Zhang, Weiwei Kang, Qingchen Dong   +11 more
wiley   +1 more source

Solvatochromic and Kinetic Response Models in (Ethyl Acetate + Chloroform or Methanol) Solvent Mixtures

Molecules, 2000
The present work analyzes the solvent effects upon the solvatochromic response models for a set of chemical probes and the kinetic response models for an aromatic nucleophilic substitution reaction, in binary mixtures in which both pure components are ...
L. R. Vottero, A. del C. Pérez, C. Adam, P. Mancini   +3 more
doaj   +1 more source