Results 101 to 110 of about 5,265 (218)

On the reactivity of isoxazoles with Mo(CO)6

, 2004
Ring opening with molybdenum hexacarbonyl of functionalized isoxazoles is a valuable synthetic process. Tetrazolopyridine 4 and pyrazolopyridine 9 were obtained from isoxazolopyridines 3 and 6, respectively, whereas the isoxazole 14 gave ketone 16 ...
Fusi, S., Stefania Fusi, Ferrini, S., Ponticelli, F., Serena Ferrini, Donato Donati, Donati, D., Fabio Ponticelli   +7 more
core   +1 more source

Divergent Reactivity in the Reaction of β‑Oxodithioesters and Hydroxylamine: Access to β‑Ketonitriles and Isoxazoles

, 2015
Starting from β-oxodithioesters and hydroxylamine, two completely different transformations afford either β-ketonitriles or isoxazoles with high chemoselectivity depending on the reaction conditions.
Jiaheng Li (1490077), Wenbo Ming (1490071), Wei Ma (299083), Na Wei (122650), Cong Xu (203537), Mang Wang (1490074)   +5 more
core   +1 more source

Molecular Structure of Heterocycles: 6. Solvent Effects on the 17O Nmr Chemical Shifts of 5-Trichloromethylisoxazoles

Journal of the Brazilian Chemical Society, 2001
A multilinear-regression analysis using the Kamlet-Abboud-Taft (KAT) solvatochromic parameters in order to elucidate and quantify the solvent effects on the 17O chemical shifts of three 5-trichloromethylisoxazoles [(1a) non-, (1b) 3-methyl- and (1c) 4 ...
Martins Marcos A. P., Freitag Rogério A., Zimmermanna Nilo E. K., Sinhorin Adilson P., Cúnico Wilson, Bastos Giovani P., Zanatta Nilo, Bonacorso Helio G.   +7 more
doaj  

Direct ring fluorination of 3-substituted 5-(1,3-dioxane) acetal isoxazoles: application to the formal synthesis of a bioactive fluorinated isoxazole

Comptes Rendus. Chimie
The access to a novel variety of 4-fluorinated isoxazoles bearing an aryl or alkyl group at the C-3 position and an acetal fragment at the C-5 position has been achieved through a direct fluorination using N-fluorobenzenesulfonimide (NFSI) with yields up
Bacheley, Lucas, Guillamot, Gérard, Phansavath, Phannarath, Ratovelomanana-Vidal, Virginie   +3 more
doaj   +1 more source

Preparation of 3,5-Disubstituted Pyrazoles and Isoxazoles from Terminal Alkynes, Aldehydes, Hydrazines, and Hydroxylamine

, 2016
The reaction of terminal alkynes with n-BuLi, and then with aldehydes, followed by the treatment with molecular iodine, and subsequently hydrazines or hydroxylamine provided the corresponding 3,5-disubstituted pyrazoles or isoxazoles in good yields with ...
Hideo Togo (1418257), Ryo Harigae (1837285), Katsuhiko Moriyama (1418254)   +2 more
core   +1 more source

Synthesis of new 3,5-substiuted isoxazole derivatives possessing potential anti-aggregative activity

Тонкие химические технологии, 2010
Two new compounds belonging to 3,5-substituted isoxazoles class were synthesized for the action mechanism investigation and the pharmacophore fragment determination of potential anti-aggregative compounds of this class.
O. V. Demina, A. V. Laptev, A. U. Lukin, N. E. Belikov, K. V. Zvezdin, M. A. Fomin, A. A. Khodonov, S. D. Varfolomeev, V. I. Shvets   +8 more
doaj  

Development of new methodologies towards the synthesis of functionalized heterocyclic isoxazolidines, isoxazoles and [1,2,4] triazoles

, 2014
This thesis describes our attempts towards the development of new methodologies for the synthesis of heterocyclic functionalized isoxazolidines, isoxazoles and [1,2,4] triazolopiperazines.
Zhu, Di
core  

Isoxazoles as Versatile Binding Elements in Carbohydrate Conjugate Chemistry

Modification of C(3) position in glucose leads to discovery of new previously unknown isoxazole-containing sugar ...
Lugiņina, Jevgeņija
core  

Distributed isoxazoles -- synthesis & photochemistry

, 2001
4-methyl-5-phenyl (F=0.43+/-0.02) and 5-methyl-4-phenyl- isoxazoles (F=0.45+/-0.01) were observed to undergo phototransposition to 4-methyl-5-phenyl and 5-methyl-4- phenyloxazoles and photocleavage to yield a-benzoyl- propionitrile and a ...
Tsefrikas, Vikki Marie
core  

Reaction of condensed cyclohexane isoxazolones with Grignard rea gents

Журнал Белорусского государственного университета: Химия, 2019
Synthesis of new 2-acyl derivatives of 1,3-cyclohexanediones, various variants of their subsequent chemical transformation are relevant for organic and bioorganic chemistry, since it is known that a large number of such substances are bioactive.
Наталья G. Vasilyeva, Fjodor A. Lakhvich, Alla L. Kozlova-Kozyrevskaya   +2 more
doaj