Results 241 to 250 of about 8,819 (284)

Structure of a norbornane‐fused pentacyclic isoxazoline

Magnetic Resonance in Chemistry, 1990
AbstractThe steric structure of a pentacyclic adduct formed as a by‐product in a retro‐Diels‐Alder reaction was elucidated by 1H and 13C NMR spectroscopy, making use of double resonance and differential nuclear Overhauser effect measurements.
Sohár Pál, Kövesdi István, Frimpong-Manso Samuel, Stájer Géza, Bernáth Gábor   +4 more
openaire   +2 more sources

Green Organocatalytic Synthesis of Isoxazolines via a One-Pot Oxidation of Allyloximes.

Organic Letters, 2017
A green, sustainable, organocatalytic, and efficient synthesis of isoxazolines from allyloximes was developed. A 2,2,2-trifluoroacetophenone-catalyzed oxidation of allyloximes, utilizing H2O2 as the green oxidant, was taken advantage of in order to ...
Ierasia Triandafillidi, C. Kokotos
semanticscholar   +1 more source

2-isoxazoline derivatives—VIII

Tetrahedron, 1974
Abstract The reaction of nitrile oxides with tropone yields a mixture of at least 8 products, the structures of which are based on spectral and chemical evidence. Both addition of the 1,3-dipole to the carbonyl group and cycloadditions to the CC double bonds system have been observed.
Remo Gandolfi, C. De Micheli, Paolo Grünanger   +2 more
openaire   +2 more sources

Iminoxyl Radical-Promoted Oxycyanation and Aminocyanation of Unactivated Alkenes: Synthesis of Cyano-Featured Isoxazolines and Cyclic Nitrones.

Organic Letters, 2017
A novel and facile approach to vicinal oxycyanation and aminocyanation of internal unactivated alkenes is developed. This method utilizes the dichotomous reactivity of iminoxyl radical derived from the initiation of β,γ- and γ,δ-unsaturated ketoximes to ...
Fei Chen, Fei-Fei Zhu, Man Zhang, Rui-Hua Liu, Wei Yu, B. Han   +5 more
semanticscholar   +1 more source

5-Hydrazino-2-isoxazolines

Chemistry of Heterocyclic Compounds, 1985
Abstract5Hydrazino‐2‐isoxazoline.
K. N. Zelenin, S. I. Yakimovich, I. P. Bezhan, V. A. Khrustalev, A. Yu. Ershov   +4 more
openaire   +3 more sources

From Alkenes to Isoxazolines via Copper-Mediated Alkene Cleavage and Dipolar Cycloaddition.

Organic Letters, 2019
An unprecedented copper-mediated anion transformation is reported, along with selective C═C double bond cleavage and dipolar cycloaddition reaction from simple alkenes and inexpensive copper nitrate.
Mingchun Gao, Yuansheng Gan, Bin Xu
semanticscholar   +1 more source

Coupling Reaction of Cu-Based Carbene and Nitroso Radical: A Tandem Reaction To Construct Isoxazolines.

Organic Letters, 2017
In this letter, an unprecedented cross-coupling reaction between copper carbene and nitroso radical has been developed. This radical-carbene coupling reaction (RCC reaction) offers a novel approach for the preparation of various isoxazolines, which ...
Rongxiang Chen, Yanwei Zhao, Shangwen Fang, Wenhao Long, Hongmei Sun, X. Wan   +5 more
semanticscholar   +1 more source

Photocatalytic Radical Trifluoromethylation/Cyclization Cascade: Synthesis of CF3-Containing Pyrazolines and Isoxazolines.

Organic Letters, 2015
A general visible light induced photoredox-catalyzed radical trifluoromethylation/cyclization cascade of β-aryl-β,γ-unsaturated hydrazones and oximes is described.
Q. Wei, Jia‐Rong Chen, Xiao-Qiang Hu, Xiao-chen Yang, Bin Lu, W. Xiao   +5 more
semanticscholar   +1 more source

Copper-mediated oxysulfonylation of alkenyl oximes with sodium sulfinates: a facile synthesis of isoxazolines featuring a sulfone substituent.

Chemical Communications, 2017
A novel and efficient Cu(OAc)2-mediated oxysulfonylation of alkenyl oximes with sodium sulfonates was developed. The reactions are easy to conduct, occur under mild conditions, and form a broad range of sulfone-substituted isoxazolines in good yields.
Li-Jing Wang, Man-qiong Chen, Lin Qi, Zhidong Xu, Wei Li   +4 more
semanticscholar   +1 more source

5-Amino-2-isoxazolines

Chemistry of Heterocyclic Compounds, 1990
The corresponding previously unknown 5-amino-2-isoxazolines were obtained by the action of ammonia and primary amines on acetylacetone monoxime and on 3,4,4-trimethyl-5-methylene-2-isoxazoline. Their structure was confirmed by NRM spectroscopy.
Kirill N. Zelenin, A. Yu. Ershov
openaire   +2 more sources