Results 211 to 220 of about 8,819 (284)

Anionic Chiral Co(III) Complexes Mediated Asymmetric Halocyclization─Synthesis of 5-Halomethyl Pyrazolines and Isoxazolines.

Organic Letters, 2021
An asymmetric synthesis of 5-halomethyl pyrazolines and isoxazolines which bear a tertiary stereocenter by catalytic halocyclization of β,γ-unsaturated hydrazones and ketoximes is described.
Xiao-Bao Wu, Quan Gao, Jun-Jie Fan, Zhenbo Zhao, Xue-Qin Tu, H. Cao, Jie Yu   +6 more
semanticscholar   +1 more source

TEMPO-Mediated Selective Synthesis of Isoxazolines, 5-Hydroxy-2-isoxazolines, and Isoxazoles via Aliphatic 𝜹-C(sp3)-H Bond Oxidation of Oximes.

Chemistry - An Asian Journal, 2021
Selective synthesis of three different bioactive heterocycles; isoxazolines, 5-hydroxy-2-isoxazolines and isoxazoles from the same starting material using TEMPO (2,2,6,6-Tetramethylpiperidin-1-oxyl) as a radical initiator is reported.
S. Mondal, Sourabh Biswas, K. Ghosh, D. Sureshkumar   +3 more
semanticscholar   +1 more source

Structure of a substituted isoxazoline [PDF]

Acta Crystallographica Section C Crystal Structure Communications, 1987
L'oxyde de cyano-3 tetramethyl-4,4,5,5 dihydro-4,5 isoxazole, C 8 H 12 N 2 O 2 , cristallise dans le systeme orthorhombique, groupe Pna2 1 et sa structure est affinee jusqu'a R=0,065.
C. George, R. Gilardi
openaire   +1 more source

Reductive Recyclization of sp3-Enriched Functionalized Isoxazolines into α-Hydroxy Lactams.

Journal of Organic Chemistry, 2021
An efficient synthesis (up to a 200 g scale) of 3-hydroxypyrrolidin-2-ones bearing alkyl substituents or functional groups at the C-5 position is described.
B. Chalyk, Andrii V Khutorianskyi, B. Vashchenko, Kyrylo Danyleiko, Anastasiia Grynyova, A. O. Osipova, A. Kozytskiy, Darya Syniuchenko, Anton Tsymbaliuk, K. Gavrilenko, A. Biitseva, D. Volochnyuk, I. Komarov, O. Grygorenko   +13 more
semanticscholar   +1 more source

An Efficient Synthesis of Isoxazoles and Isoxazolines [PDF]

HETEROCYCLES, 1985
AbstractDurch Umsetzung der, Hydroxamsäurechloride (III) mit Dipolarophilen wie (II), (IV) u.ä.
P. Caldirola, M. De Amici, C. De Micheli, P. Pevarello   +3 more
openaire   +2 more sources

Isoxazolin-5-one

Journal of the Chemical Society C: Organic, 1971
The reaction paths leading from ethyl propiolate to isoxazolin-5-one (II) and isoxazolin-3-one (III) are discussed and shown to be pH-dependent. The chemical and tautomeric properties of compound (II) are consistent with the known behaviour of its derivatives.
DE SARLO, FRANCESCO, G. DINI, P. LACRIMINI   +2 more
openaire   +3 more sources

Recent advances in the oxime-participating synthesis of isoxazolines.

Organic and biomolecular chemistry, 2020
Isoxazoline compounds are used as important intermediates for the synthesis of organic molecules, which are widely used in the chemical and life science industries. Oxime-participating cyclization has emerged as an efficient strategy for the construction
Jianhua Liao, Lu Ouyang, Qianru Jin, Jian Zhang, Renshi Luo   +4 more
semanticscholar   +1 more source

Photochemistry of condensed isoxazolines

Monatshefte für Chemie Chemical Monthly, 1994
The condensed bridged isoxazolines4 are rearranged on irradiation with a low-pressure mercury lamp exclusively into condensed derivatives of tetrahydropyridine5. The selectivity of the rearrangement is due to a stabilization of the biradical8 by the overlap of the radical-electrons with π-electrons of the C=C double bond and the heterocyclic ring ...
Lubor Fišera, N. Pronayova, Vladimír Ondruš   +2 more
openaire   +2 more sources

Insecticidal quinoline and isoquinoline isoxazolines

Bioorganic & Medicinal Chemistry Letters, 2014
A series of quinoline and isoquinoline isoxazolines have been designed as pesticides for crop protection. Herein we reported the chemical synthesis, biological activity and structure-activity relationships. The isoquinoline derivative, such as 3i, is discovered as potent new class of isoxazoline insecticide which is competitive with commercial ...
George Philip Lahm, Ming Xu, Ty Wagerle, James D. Barry, Rejane M. Smith, Jeffrey Keith Long   +5 more
openaire   +3 more sources

Review of extralabel use of isoxazolines for treatment of demodicosis in dogs and cats.

Journal of the American Veterinary Medical Association, 2020
Amitraz is presently the only FDA-approved treatment for demodicosis in dogs in the United States. Amitraz treatment involves a protracted course of administration and risks of severe adverse effects such as sedation, bradycardia, and respiratory ...
Xueying Zhou, A. Hohman, W. Hsu
semanticscholar   +1 more source