Results 21 to 30 of about 10,038 (159)

A study on selective transformation of norbornadiene into fluorinated cyclopentane-fused isoxazolines

Beilstein Journal of Organic Chemistry, 2021
This work presents an examination of the selective functionalization of norbornadiene through nitrile oxide 1,3-dipolar cycloaddition/ring-opening metathesis (ROM)/cross-metathesis (CM) protocols. Functionalization of commercially available norbornadiene
Zsanett Benke, Attila M. Remete, Loránd Kiss   +2 more
doaj   +1 more source

Functionalized Nitrile Oxides and Their Synthetic Equivalents: Recent Advances in Generation Methods and Synthetic Applications

Molecules
Functionalized nitrile oxides have attracted increasing attention because the incorporated functional groups not only influence cycloaddition reactivity but also provide valuable handles for subsequent molecular diversification.
Nagatoshi Nishiwaki
doaj   +1 more source

Conversion of Oximes to Carbonyl Compounds by Triscetylpyridinium Tetrakis(oxodiperoxotungsto) Phosphate (PCWP)-mediated Oxidation with Hydrogen Peroxide

Molecules, 2008
Aromatic and aliphatic oximes have been deoximated in chloroform-water to the corresponding aldehydes with dilute hydrogen peroxide and triscetylpyridinium tetrakis (oxodiperoxotungsto) phosphate as catalyst.
Rosa M. Toscano, Gaetano Tomaselli, Antonio Rescifina, Ugo Chiacchio, Francesco P. Ballistreri   +4 more
doaj   +1 more source

Controllable cyanation of carbon-hydrogen bonds by zeolite crystals over manganese oxide catalyst

Nature Communications, 2017
Sustainable strategies for nitrile synthesis are needed. Here, the authors report an environmentally benign, selective heterogeneous catalyst for the synthesis of nitriles by the oxidative cyanation of carbon and hydrogen (C-H) bonds, which comprises ...
Liang Wang, Guoxiong Wang, Jian Zhang, Chaoqun Bian, Xiangju Meng, Feng-Shou Xiao   +5 more
doaj   +1 more source

The effect of zinc oxide nanoparticle morphology on activity in crosslinking of carboxylated nitrile elastomer

eXPRESS Polymer Letters, 2009
The aim of this work was to study the activity of several nanosized zinc oxides in the crosslinking of carboxylated nitrile elastomer (XNBR). In this article, we discuss the effect of zinc oxide nanoparticles with respect to their specific surface area ...
doaj   +1 more source

"Effect of graphene oxide with different oxidation degrees on mechanical properties of carboxylated acrylonitrile-butadiene rubber: Experiment and molecular simulation"

Hecheng xiangjiao gongye, 2023
Graphene oxide(GO) with different oxidation degree was prepared and was used to strengthen carboxyl nitrile rubber（XNBR）. And the tensile properties and binding energy were studied by experiments and molecular simulation.
FU Quan-sheng1, WEN Yan-wei2, LOU Yang2, ZHANG Xu-min1, JIA Hong-bing1 *
doaj   +1 more source

Synthesis of a Novel Tetracyclic Isoxazole by Intramolecular Nitrile Oxide Cycloaddition

Molbank
Intramolecular cycloadditions have the great advantage of forming two rings simultaneously. We report the use of intramolecular [3 + 2] cycloaddition of the nitrile oxide derived from an N-propargylbenzimidazole oxime in the synthesis of a hitherto ...
Gavin R. Hoffman, Allen M. Schoffstall
doaj   +1 more source

Combined experimental and theoretical studies of regio- and stereoselectivity in reactions of β-isoxazolyl- and β-imidazolyl enamines with nitrile oxides

Beilstein Journal of Organic Chemistry, 2016
Reactions of β-azolyl enamines and nitrile oxides were studied by both experimental and theoretical methods. (E)-β-(4-Nitroimidazol-5-yl), (5-nitroimidazol-4-yl) and isoxazol-5-yl enamines smoothly react regioselectively at room temperature in dioxane ...
Ilya V. Efimov, Marsel Z. Shafikov, Nikolai A. Beliaev, Natalia N. Volkova, Tetyana V. Beryozkina, Wim Dehaen, Zhijin Fan, Viktoria V. Grishko, Gert Lubec, Pavel A. Slepukhin, Vasiliy A. Bakulev   +10 more
doaj   +1 more source

Side-chain Modifications of Highly Functionalized 3(2H)-Furanones

Molecules, 2012
A series of 3(2H)-furanones, based on side-chain modifications of a parent 3(2H)-furanone, was synthesized in good yield. The parent compound was prepared by hydrogenolysis, and subsequent acid hydrolysis, of isoxazole derivatives.
Gil Valdo José da Silva, Maurício Gomes Constantino, Viviani Nardini, Shirley Muniz Machado Rodrigues   +3 more
doaj   +1 more source

Facile and green synthesis of 3,5-disubstituted isoxazoles using doped nano-sized copper(I) oxide (Cu2O) on melamine–formaldehyde resin as an efficient nano-catalyst under ultrasonic irradiation [PDF]

شیمی کاربردی روز, 2019
In the present research, doped nano-sized copper(I) oxide (Cu2O) on melamine–formaldehyde resin as a heterogeneous and efficient nano-catalyst has been employed for green and mild synthesis of 3,5-disubstituted isoxazoles under ultrasonic irradiation. In
Somayeh Behrouz
doaj   +1 more source