Results 291 to 300 of about 2,937,461 (378)

In Situ Generation of Nitrile Oxides from NaCl-Oxone Oxidation of Various Aldoximes and Their 1,3-Dipolar Cycloaddition.

Organic Letters, 2019
Reported is a new green protocol for the efficient in situ generation of nitrile oxides through NaCl/Oxone oxidation of aldoximes and their dipolar cycloaddition.
Guodong Zhao, Lixin Liang, Chi Ho Ethan Wen, Rongbiao Tong   +3 more
semanticscholar   +1 more source

Iterative Assembly of Nitrile Oxides and Ynamides: Synthesis of Isoxazoles and Pyrroles.

Journal of Organic Chemistry, 2019
Described is an iterative assembly of nitrile oxides and ynamides for the synthesis of isoxazoles and pyrroles. The nitrile oxides could undergo Cu(I)-free cyclization with terminal ynamides for accessing isoxazoles, which could engage in another ...
Changwei Chen, Sunliang Cui
semanticscholar   +1 more source

DABCO-mediated [3+3] cycloaddition of azomethine imines with in situ generated nitrile oxides from hydroximoyl chlorides.

Chemical Communications, 2019
A novel cross 1,3-dipolar cycloaddition between azomethine imines with in situ generated nitrile oxides has been developed. This is the first example of employing a reaction partner containing two heteroatoms in the [3+3] cycloaddition involving ...
Qing-Yun Fang, Hai-Shan Jin, Ru-Bing Wang, Li-Ming Zhao   +3 more
semanticscholar   +1 more source

In situ generation of nitrile oxides from copper carbene and tert-butyl nitrite: synthesis of fully substituted isoxazoles.

Organic and biomolecular chemistry, 2018
Herein, we present a novel [3 + 2] cycloaddition reaction of β-keto esters with nitrile oxides, which were generated in situ from copper carbene and tert-butyl nitrite.
Rongxiang Chen, A. Ogunlana, Shangwen Fang, Wenhao Long, Hongmei Sun, Xiaoguang Bao, X. Wan   +6 more
semanticscholar   +1 more source

Addition of Nitrile Oxides to N‐Allylsaccharin. [PDF]

ChemInform, 2005
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access the actual ChemInform Abstract, please click on HTML or PDF.
Edmunds Lukevics, V. Dirnens, S. Belyakov   +2 more
openaire   +2 more sources

A nitroketene to nitrile oxide transformation

Journal of the Chemical Society, Chemical Communications, 1992
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Kappe, CO, Kollenz, G, Wentrup, C
openaire   +4 more sources

ChemInform Abstract: Cycloaddition of Nitrile Oxides to (60)Fullerene.

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
DA ROS, TATIANA, PRATO, MAURIZIO, F. NOVELLO, M. MAGGINI, M. DE AMICI, C. DE MICHELI   +5 more
openaire   +6 more sources

Amine-Urea-Mediated Asymmetric Cycloadditions between Nitrile Oxides and o-Hydroxystyrenes by Dual Activation.

Angewandte Chemie, 2017
The first example of asymmetric 1,3-dipolar cycloadditions between nitrile oxides and o-hydroxystyrenes, mediated by cinchona-alkaloid-based amine-ureas is reported. The method is based on a dual activation involving both LUMO and HOMO activations.
H. Suga, Y. Hashimoto, Y. Toda, K. Fukushima, Hiroyoshi Esaki, Ayaka Kikuchi   +5 more
semanticscholar   +1 more source

Enolate-mediated 1,3-dipolar cycloaddition reaction of β-functionalized ketones with nitrile oxides: direct access to 3,4,5-trisubstituted isoxazoles.

Organic and biomolecular chemistry, 2016
TMG-catalyzed [3 + 2] organocatalytic 1,3-dipolar cycloaddition reactions of β-functionalized ketones with nitrile oxides have been developed. This strategy could generate 3,4,5-trisubstituted isoxazoles in high yields and regioselectivities.
Xiao Zhou, Xianhong Xu, Zhenyan Shi, Kun Liu, Hua Gao, Wenjun Li   +5 more
semanticscholar   +1 more source

Understanding the reactivity and regioselectivity of [3 + 2] cycloaddition reactions between substituted nitrile oxides and methyl acrylate. A molecular electron density theory study

, 2017
The [3 + 2] cycloaddition (32CA) reactions of three nitrile oxides (NOs) (R-CNO; R = Ph, CO2Me, and Br) with methyl acrylate (MA) have been theoretically studied within the molecular electron density theory.
I. M. Ndassa, A. I. Adjieufack, J. Ketcha, S. Berski, M. Ríos‐Gutiérrez, L. Domingo   +5 more
semanticscholar   +1 more source