Results 41 to 50 of about 8,819 (284)

Synthesis of 3,5-Disubstituted Isoxazoles and Isoxazolines in Deep Eutectic Solvents [PDF]

open access: yes, 2015
The synthesis of different 3,5-disubstituted isoxazoles and related isoxazolines using choline chloride:urea as deep eutectic solvent (DES) in a one-pot three step reaction has been accomplished successfully. The use of highly nucleophilic functionalized
Pérez Galera, Juana María   +1 more
core   +3 more sources

Oxidize Amines to Nitrile Oxides: One Type of Amine Oxidation and Its Application to Directly Construct Isoxazoles and Isoxazolines.

open access: yesJournal of Organic Chemistry, 2020
A facile oxidative heterocyclization of commercially available amines and tert-butyl nitrite with alkynes or alkenes leading to isoxazoles or isoxazolines is described.
Xiao-Wei Zhang   +4 more
semanticscholar   +1 more source

Glucose-derived spiro-isoxazolines are anti-hyperglycemic agents against type 2 diabetes through glycogen phosphorylase inhibition [PDF]

open access: yes, 2016
International audienceGlycogen phosphorylase (GP) is a target for the treatment of hyperglycaemia in the context of type 2 diabetes. This enzyme is responsible for the depolymerization of glycogen into glucose thereby affecting the levels of glucose in ...
Azay-Milhau, Jacqueline   +16 more
core   +2 more sources

A one-pot synthesis of 3-trifluoromethyl-2-isoxazolines from trifluoromethyl aldoxime

open access: yesBeilstein Journal of Organic Chemistry, 2013
Functionalized 3-trifluoromethyl-2-isoxazolines and 3-trifluoromethylisoxazoles were easily prepared from trifluoromethyl aldoxime 2 under mild conditions by using DIB as oxidant.
Raoni S. B. Gonçalves   +4 more
doaj   +1 more source

Chalcones as versatile synthons for the synthesis of 5- and 6-membered nitrogen heterocylces [PDF]

open access: yes, 2014
Chalcones belong to the flavonoid family which constitutes one of the major classes of naturally occurring oxygen heterocyclic compounds. The alpha,beta-unsaturated carbonyl system of chalcones possesses two electrophilic reactive centers allowing them ...
Albuquerque, Hélio   +3 more
core   +1 more source

Iodoarene-catalyzed cyclizations of N-propargylamides and β-amidoketones: synthesis of 2-oxazolines

open access: yesBeilstein Journal of Organic Chemistry, 2017
Two complementary iodoarene-catalyzed methods for the preparation of 2-oxazolines are presented. The first involves the cyclization of N-propargylamides and the second involves the cyclization of β-amidoketones.
Somaia Kamouka, Wesley J. Moran
doaj   +1 more source

Gold-catalyzed propargylic substitutions: Scope and synthetic developments

open access: yesBeilstein Journal of Organic Chemistry, 2011
This personal account summarizes our recent developments in gold-catalyzed direct substitutions on propargylic (allylic, benzylic) alcohols, with various nucleophiles (and bi-nucleophiles) based on the σ- and/or π-acidity of gold(III) complexes ...
Olivier Debleds   +3 more
doaj   +1 more source

Anti-cancer activity of novel dibenzo[b,f]azepine tethered isoxazoline derivatives [PDF]

open access: yes, 2012
10.1186/1472-6769-12-5BMC Chemical ...
Anilkumar, N.C.   +10 more
core   +3 more sources

Oxime radicals: generation, properties and application in organic synthesis

open access: yesBeilstein Journal of Organic Chemistry, 2020
N-Oxyl radicals (compounds with an N–O• fragment) represent one of the richest families of stable and persistent organic radicals with applications ranging from catalysis of selective oxidation processes and mechanistic studies to production of polymers,
Igor B. Krylov   +3 more
doaj   +1 more source

Synthesis, Antimicrobial and Antioxidant Activities of 2-Isoxazoline Derivatives

open access: yesMolecules, 2020
A series of derivatives of trans-3-(2,4,6-trimethoxyphenyl)4,5-dihydroisoxazolo-4,5-bis[carbonyl-(4′phenyl)thiosemicarbazide (9) and of trans-3-(2,4,6-trimethoxyphenyl)-4,5-dihydro isoxazolo-4,5-bis(aroylcarbohydrazide) (10a–c) were synthesized from ...
Asma Alshamari   +4 more
doaj   +1 more source

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