Results 11 to 20 of about 10,249 (213)

Frame-Shifted Synthesis of Oligoheterocycles as a Platform for Molecular Design. [PDF]

Angew Chem Int Ed Engl
Modern chemistry seeks to turn the simple raw materials into complex molecules that matter in health, agriculture, and technology. Among these, oligoheterocycles stand out for their versatility, yet they are most often built by cross‐coupling reactions that often rely on expensive metal catalysts.
Bastick KAC, Griesbach CE, Huang BZ, Cordell MJ, Ou YD, Aspuru-Guzik A, Yudin AK.   +6 more
europepmc   +3 more sources

A New Approach for the Synthesis of N-Arylamides Starting from Benzonitriles

Chemistry Proceedings, 2021
N-Arylamides are a ubiquitous component of a broad range of natural products and biologically active compounds. In this paper, a new synthetic protocol for the preparation of N-arylamides was developed via the hypervalent iodine-mediated aza-Hofmann-type
Pradip Debnath
doaj   +1 more source

Synthesis of Boronated Amidines by Addition of Amines to Nitrilium Derivative of Cobalt Bis(Dicarbollide)

Molecules, 2021
A series of novel cobalt bis(dicarbollide) based amidines were synthesized by the nucleophilic addition of primary and secondary amines to highly activated B-N+≡C–R triple bond of the propionitrilium derivative [8-EtC≡N-3,3′-Co(1,2-C2B9H10)(1′,2′-C2B9H11)
Ekaterina V. Bogdanova, Marina Yu. Stogniy, Kyrill Yu. Suponitsky, Igor B. Sivaev, Vladimir I. Bregadze   +4 more
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Syntheses and molecular structures of some di(amidino)monosilanes

Main Group Metal Chemistry, 2021
The syntheses of three different amidinosilanes of the type Me2Si[N=C(Ph)R]2 with R = pyrrolidino, morpholino, and diethylamino and one derivative with the composition R2Si[N=C(Ph)R]2 with R = morpholino are reported. These compounds were prepared in one-
Bös Markus, Herbig Marcus, Böhme Uwe, Kroke Edwin   +3 more
doaj   +1 more source

Triflamidation of Allyl-Containing Substances:Unusual Dehydrobromination vs. Intramolecular Heterocyclization

Molecules, 2022
Allyl halides with triflamide under oxidative conditions form halogen-substituted amidines. Allyl cyanide reacts with triflamide in acetonitrile or THF solutions in the presence of NBS to give the products of bromotriflamidation with a solvent ...
Anton S. Ganin, Mikhail Yu. Moskalik, Ivan A. Garagan, Vera V. Astakhova, Bagrat A. Shainyan   +4 more
doaj   +1 more source

Modern chemical disinfectants and antiseptics. Part I

Журнал органічної та фармацевтичної хімії, 2021
Aim. To generalize and systematize information on the properties of modern chemical disinfectants and antiseptic agents (DA and AA). Results and discussion.
Vasyl M. Britsun, Nataliya V. Simurova, Inna V. Popova, Oleksii V. Simurov   +3 more
doaj   +1 more source

Regioselective synthesis of heterocyclic N-sulfonyl amidines from heteroaromatic thioamides and sulfonyl azides

Beilstein Journal of Organic Chemistry, 2020
N-Sulfonyl amidines bearing 1,2,3-triazole, isoxazole, thiazole and pyridine substituents were successfully prepared for the first time by reactions of primary, secondary and tertiary heterocyclic thioamides with alkyl- and arylsulfonyl azides.
Vladimir Ilkin, Vera Berseneva, Tetyana Beryozkina, Tatiana Glukhareva, Lidia Dianova, Wim Dehaen, Eugenia Seliverstova, Vasiliy Bakulev   +7 more
doaj   +1 more source

Acaricide resistance of Rhipicephalus decoloratus ticks collected from communal grazing cattle in South Africa

Journal of Advanced Veterinary and Animal Research, 2022
Objective: This study aimed to determine acaricide resistance in Rhipicephalus decoloratus ticks collected from grazing cattle between November 2018 and May 2019 in Elundini, Senqu, and Walter Sisulu Local Municipalities in the northeastern region of the
Mandla Yawa, Nkululeko Nyangiwe, Ishmael Festus Jaja, Munyaradzi Christopher Marufu, Charles T. Kadzere   +4 more
doaj   +1 more source

Copper-Catalyzed One-Pot Synthesis of N-Sulfonyl Amidines from Sulfonyl Hydrazine, Terminal Alkynes and Sulfonyl Azides

Molecules, 2021
N-Sulfonyl amidines are developed from a Cu-catalyzed three-component reaction from sulfonyl hydrazines, terminal alkynes and sulfonyl azides in toluene at room temperature.
Yu Zhao, Zitong Zhou, Man Chen, Weiguang Yang   +3 more
doaj   +1 more source

Principais métodos de síntese de amidinas

Química Nova, 2006
The amidine functional group is found in a wide range of natural products and is biologically active against several pathogens. In addition, amidines have long been regarded as useful intermediates in the synthesis of heterocyclic compounds. Consequently,
Maurício Silva dos Santos, Alice Maria Rolim Bernardino, Marcos Costa de Souza   +2 more
doaj   +1 more source