Results 51 to 60 of about 3,769 (135)

Synthetic Studies Directed Toward Streptenol D: Enantioselective Preparation of the 3,5-diacetoxy-6\u3cem\u3eE\u3c/em\u3e,8\u3cem\u3eE\u3c/em\u3e-decadiene Segment [PDF]

open access: yes, 1998
The enantioselective preparation of 2-(3′R,5′R-diacetoxy-6E,8E-decadienyl)-1,3-dioxane, (+)-13, is described. This synthesis of the skeleton of streptenol D utilizes the ability of a diene-complexed (tricarbonyl)iron unit to serve as a protecting and ...
Dasgupta, Bireshwar, Donaldson, William
core   +1 more source

A Facile Synthesis of Some Bioactive Isoxazoline Dicarboxylic Acids via Microwave-Assisted 1,3-Dipolar Cycloaddition Reaction

open access: yesReactions
The microwave-assisted 1,3-dipolar cycloaddition reaction of several aldoximes and dimethyl-2-methylene glutarate in the presence of diacetoxyiodobenzene as an oxidant produced four new isoxazoline-derived dimethyl carboxylates.
Jessica Master   +5 more
doaj   +1 more source

Bicyclic Pyrrolidine-Isoxazoline γ Amino Acid: A Constrained Scaffold for Stabilizing α-Turn Conformation in Isolated Peptides

open access: yesFrontiers in Chemistry, 2019
Unnatural amino acids have tremendously expanded the folding possibilities of peptides and peptide mimics. While α,α-disubstituted and β-amino acids are widely studied, γ-derivatives have been less exploited.
Francesco Oliva   +5 more
doaj   +1 more source

Synthesis and reductive cleavage of 3-(2-flurophenyl) and 3-(4-flurophenyl)-cyclopent-5-en[d]isoxazolines by raney nickel in trifluroacetic acid [PDF]

open access: yes, 2013
3-Fluoro arylcycloopent-5-en[d]isoxazolines have been obtained via the 1,3-dipolar cycloaddition of cyclopentadiene to aromatic nitrile oxides. The reductive cleavage of these isoxazolines by Raney nickel in trifluoroacetic acid led to corresponding ...
Antonevich, I. P.   +2 more
core  

Acaricidal Activity Of The Orally Administered Isoxazoline Drugs (lotilaner, Fluralaner, And Afoxolaner) In White-Footed Mice Against Larval Ticks [PDF]

open access: yes, 2023
Lyme disease, caused by Borrelia burgdorferi, is currently the most prevalent vector borne disease in North America. With the CDC estimating almost 500,000 new cases every year, methods are needed to control the vector, the black legged tick (Ixodes ...
Gisi, Emily Marie
core   +1 more source

trans-Hydroxylation of cyclopent-5-ene[d]isoxazolines [PDF]

open access: yes, 2013
The title reaction has been studied as a variant of the cyclopentane ring functionalization of cyclopent-5-ene[d]isoxazolines as the key intermediates in total synthesis of azaand oxo prostaglandin analogues by nitrileoxides approach.
Antonevich, I. P., Nesterova, S. V.
core  

Synthesis and Study Biological Activity of Some New Isoxazoline and Pyrazoline derivatives

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2017
   This work involves synthesis of novel Schiff bases derivatives contining isoxazoline or pyrazoline units starting with chalcons . 4-Aminoacetophenone was reacted with 3-nitrobenzaldehyde in basic medium giving chalcone [I] by claisen-schemidt ...
Muna S. Al-Rawi   +2 more
doaj  

The catalytic hydrogenation of 3-(2-fluorophenyl)- and 3-(4-fluorophenyl)-4,4-ethylenedioxycyclopenta[d]isoxazolines [PDF]

open access: yes, 2016
The catalytic hydrogenation of 3-(2-fluorophenyl)- and 3-(4-fluorophenyl)-4,4-ethylenedioxycyclo-penta[d ]isoxazolines led with good yields to corresponding fluorinated β -hydroxyketones.
Antonevich, I. P.   +2 more
core  

Synthesis and Characterization of Some New Pyrazoline and Isoxazoline Derivatives as Antibacterial Agents [PDF]

open access: yes, 2016
In this paper some chalcones (C1-C8) are prepared based on the reaction of one mole of substituted acetophenone with one mole of substituted benzaldehydes in the presence of (40%) sodium hydroxide as a base.
Al-Naseeri, Ali K. Alywee
core   +2 more sources

Studies of the Synthesis of Fused Isoxazoline/Isoquinolinones and Evaluation of the Antifungal Activity of Isoxazole-like Benzamide and Isoquinolinone Hybrids

open access: yesMolecules
Isoxazole derivatives (isoxazoles, isoxazolines, and isoxazolidines) are present in the structure of several natural products and/or pharmaceutically interesting compounds.
Konstantinos A. Ouzounthanasis   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy