Results 141 to 150 of about 195,223 (291)

Formation of silicon centered spirocyclic compounds: reaction of N-heterocyclic stable silylene with benzoylpyridine, diisopropyl azodicarboxylate, and 1,2-diphenylhydrazine.

Inorganic Chemistry, 2011
R. Azhakar, S. Sarish, G. Tavčar, H. Roesky, J. Hey, D. Stalke, Debasis Koley   +6 more
semanticscholar   +1 more source

One‐Pot Amidation/C─H Halogenation by an Efficient Electrochemical Cascade

Angewandte Chemie, EarlyView.
A sustainable electrochemical cascade enables the one‐pot synthesis of regioselectively halogenated N‐aryl amides from readily available amines and acyl halides under mild conditions. The method merges amidation and C─H halogenation in a single operational step, delivering broad substrate scope, high selectivity, and scalability, and provides an ...
Sudipta Ponra, Ruzal Sitdikov, Hasil Aman, Alyssio Calis, Gergely Laczkó, Virgile Rouffeteau, Maxime R. Vitale, Imre Pápai, Oscar Verho   +8 more
wiley   +2 more sources

Chemical characterization of liquefaction products of an inertinite enriched northern Alaska coals [PDF]

, 1989
A Northern Alaskan coal rich in inertinites was further enriched by density gradient separations. The degree of condensation of the enriched coal was estimated to be low, mainly 3 ring.
Mayasandra, Venugopal
core  

Vinylogous aldol reaction of heterocyclic silyloxy dienes. Application in synthesis [PDF]

, 2000
A versatile, readily accessible triad of 2-enoxy silane synthons derived from furan, pyrrole, and thiophene is presented. These heterocycles, in reacting with carbonyl and carbonyl- related acceptors, act as vinylogous nucleophile modules, giving rise ...
Casiraghi, Giovanni, Rassu, Gloria Maria Rita, Zanardi, Franca   +2 more
core  

Griseofamines A and B: Two Indole-Tetramic Acid Alkaloids with 6/5/6/5 and 6/5/7/5 Ring Systems from Penicillium griseofulvum.

Organic Letters, 2018
Y. Zang, G. Genta‐Jouve, Yingyu Zheng, Qing Zhang, Chunmei Chen, Qun Zhou, Jianping Wang, Hucheng Zhu, Yonghui Zhang   +8 more
semanticscholar   +1 more source

Studies of novel heterocyclic insensitive high explosive compounds: pyridines, pyrimidines, pyrazines and their bicyclic analogues

, 2004
R. Millar, Simon P. Philbin, R. Claridge, Javid Hamid   +3 more
semanticscholar   +1 more source

New alkaloids from the noni juice with potential α-glucosidase inhibitory activity.

Fitoterapia, 2021
Bin Zhang, Zhang-Xin Yu, Xue-ming Zhou, Xu-Hua Nong, Xiao-bao Li, Hao Wang, Hui Wang, Guangying Chen   +7 more
semanticscholar   +1 more source

Two‐Dimensional Polymers as Modular Metal‐Free Solid‐State Catalysts for Efficient Sono‐Piezo‐Photocatalytic Hydrogen Peroxide Production

Angewandte Chemie International Edition, EarlyView.
This study demonstrates the high piezo‐photocatalytic activity of solid molecular catalysts (SMCs) in the production of hydrogen peroxide from water and oxygen. Through the rational design of molecular motifs (diphenylpyridine or terpyridine) and backbone functionalities (methyl group, aliphatic amine antenna, or aromatic pyrrole unit), as well as ...
Sarah Brettschneider, Keanu V. A. Birkelbach, Marcus Lantzius‐Beninga, Ahmed Mourran, Gurudas Chakraborty, Peter J. C. Hausoul, Andreas Herrmann, Regina Palkovits   +7 more
wiley   +1 more source

Mapping the Reactivity of the C═C Bond of Cyclic Enol Ether Derivatives of Sugars: Nucleophilicity Parameters of Glycals

Angewandte Chemie International Edition, EarlyView.
Endo or Exo? The first quantitative kinetic mapping of the nucleophilic reactivity of endo‐ and exo‐glycal compounds highlighted that endo‐glycals are typically 102 times less reactive than their corresponding parent cyclic enol ethers while exo‐glycals are 103 more nucleophilic. This experimental and computational structure–reactivity study highlights
Sophie Rodrigues, Saloua Chelli, Jenny Ha, Lucie Pedussaut, Sami Lakhdar, Raphaël Robiette, Stéphane P. Vincent, Guillaume Berionni   +7 more
wiley   +1 more source

Design, synthesis, molecular docking and cytotoxic evaluation of novel pyrimidine-based sulfonamide derivatives as potent anticancer agents: SAR insights and biological profiling. [PDF]

Sci Rep
Bayoumy NM, Fadda AA, Gaffer HE, Soliman NN.   +3 more
europepmc   +1 more source