Results 241 to 250 of about 8,940 (287)

2‐Isoxazoline derivatives. Part I. A base‐promoted fragmentation of 2‐isoxazolines

Journal of Heterocyclic Chemistry, 1968
AbstractThe action of bases on 3‐aryl (or alkyl)‐5‐acyl‐2‐isoxazolines has been shown to give rise to the corresponding aromatic (or aliphatic) nitriles and α‐diketones by cleavage of the O‐N and C3C4 bonds of the heterocyclic ring. This fragmentation reaction has been extended to other 2‐isoxazolines substituted in the 5‐position with electron ...
Remo Gandolfi, Giorgio Bianchi, Paolo Grünanger   +2 more
openaire   +2 more sources

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

General 5-Halomethyl Isoxazolines Synthesis Enabled by Copper-Catalyzed Oxyhalogenation of Alkenes.

Journal of Organic Chemistry, 2019
A general and efficient oxyhalogenation of unsaturated ketoximes has been achieved through copper catalysis with diethyl bromomalonate, NCS and NIS, yielding 5-chloromethyl, 5-bromomethyl as well as 5-iodomethyl isoxazolines in good to excellent yields.
Xiaoqing Li, Yu Ding, Lijie Qian, Yang Gao, Xinqiang Wang, Xinhuan Yan, Xiangsheng Xu   +6 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

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

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

Synthesis of Isoxazoline-Substituted Symmetrical Diketopiperazines

Synlett, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Marilyn M. Olmstead, Kyung Ho Park, Mark J. Kurth   +2 more
openaire   +3 more sources

Isoxazolines and isoxazoles as factor Xa inhibitors

Bioorganic & Medicinal Chemistry Letters, 2000
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.
Ruth R. Wexler, Matthew R. Wright, Robert M. Knabb, Donald J. P. Pinto, Melissa J. Estrella, Pancras C. Wong, James Russell Pruitt, Lori L. Bostrom   +7 more
openaire   +4 more sources

A three-component cycloaddition of alkyl trifluorodiazoethane for the synthesis of trifluoromethylated isoxazolines

Chemistry of Heterocyclic Compounds, 2023
Jingwen Xu, Jiang Liu, Haibo Mei, V. Soloshonok, Jianlin Han   +4 more
semanticscholar   +1 more source

Synthesis, Antioxidant, and Antibacterial Activities of Two Novel Series of 3,5-Disubstituted Isoxazole Ether-Linked Isoxazolines and 3,5-Disubstituted Pyrazole Ether-Linked Isoxazolines Mediated by Chloramine-T

Russian journal of bioorganic chemistry, 2022
E. M. Saleh, S. Y. Kotian, A. M. Al Dawsari, I. Hassan, K. Husain, P. Abishad, K. Byrappa, R. Sharabi, K. Rai   +8 more
semanticscholar   +1 more source