Results 101 to 110 of about 1,834 (212)

Methylene Insertion into Nitrogen‐Heteroatom Single Bonds of 1,2‐Azoles via a Zinc Carbenoid: An Alternative Tool for Skeletal Editing

Advanced Science
The nitrogen‐heteroatom single bonds of 1,2‐azoles and isoxazolines underwent methylene insertion in the presence of CH2I2 (6 equiv.) and diethylzinc (3 equiv.) to produce a wide variety of the ring‐expanded six‐membered heterocycles.
Masato Tsuda, Taiki Morita, Yuto Morita, Jun Takaya, Hiroyuki Nakamura   +4 more
doaj   +1 more source

Functional 3-Arylisoxazoles and 3-Aryl-2-isoxazolines from reaction of aryl nitrile oxides and enolates: Synthesis and reactivity

, 2013
Heterocyclic compounds are crucial starting reagents and intermediates, or they are direct precursors of target chemicals and/or bio-pharmacological active compounds. Today, they are used in the total synthesis of natural products, in drugs or herbicides,
Vitale P., Scilimati A.
core   +1 more source

Developing molecular diversity in the construction of a family of bicyclic isoxazolines scaffolds: Control of regio-and diastereoselectivities

, 2003
A completely regioselective approach to bicyclic isoxazolines has been found starting from 4-cyclopentene-1,3-dione or 2-cyclopentenones. 1,3-Dipolar cycloaddn. with nitrile oxides gave different semirigid bicyclic scaffolds with at least four points of
Giorgi, Gianluca, Lampariello, L. Raffaella, Riello, V., Rodriquez, Manuela, Riello Vincenzo, Minetto, G., Manuela Rodriquez, Paoli, M. L., L. Raffaella Lampariello, Sega, Alessandro, M. Laura Paoli, Rodriquez, M., Lampariello, L. R., Minetto, Giacomo, Sega A., Paoli, M. Laura, Vincenzo Riello, Giorgi, G., Gianluca Giorgi, Giacomo Minetto, Alessandro Sega   +20 more
core   +1 more source

PYRAZOLINES AND ISOXAZOLINES (I). SYNTHESIS AND ANTIMICROBIAL ACTIVITIES OF P-(1-ACYL-3-METHYL-5-ARYL-4 PYRAZOLINOYL / P-(3-METHYL-5-ARYL-4ISOXAZOLINOYL) ARSANILIC ACID [PDF]

Journal of Sciences, Islamic Republic of Iran, 1993
4-(acetoacetamido) arsanilic acid (II), which was then condensed with aryl aldehydes. The resulting product on reaction with hydrazine hydrate and hydroxyl amine hydrochloride yielded Pyrazolines (IV) and Isoxazolines (V), respectively. The antimicrobial
doaj  

P-37 Synthesis of Isoxazolines

, 2014
Isoxazolines are organic molecules characterized by their five-membered ring heterocycles containing nitrogen and oxygen, and by their diverse synthetic and biological properties.
Thornhill, Rosanne
core  

tert-Butyl Nitrite-Induced Radical Nitrile Oxidation Cycloaddition: Synthesis of Isoxazole/Isoxazoline-Fused Benzo 6/7/8-membered Oxacyclic Ketones

Molecules
A practical metal-free and additive-free approach for the synthesis of 6/7/8-membered oxacyclic ketone-fused isoxazoles/isoxazolines tetracyclic or tricyclic structures is reported through Csp3–H bond radical nitrile oxidation and the intramolecular ...
Jian-Kang Cao, Tian-Zheng Cao, Qian-Wen Yue, Ying Ma, Chuan-Ming Yang, Hong-Xi Zhang, Ya-Chen Li, Qiao-Ke Dong, Yan-Ping Zhu, Yuan-Yuan Sun   +9 more
doaj   +1 more source

Synthesis and reductive cleavage of 3-(2-flurophenyl) and 3-(4-flurophenyl)-cyclopent-5-en[d]isoxazolines by raney nickel in trifluroacetic acid [PDF]

, 2013
3-Fluoro arylcycloopent-5-en[d]isoxazolines have been obtained via the 1,3-dipolar cycloaddition of cyclopentadiene to aromatic nitrile oxides. The reductive cleavage of these isoxazolines by Raney nickel in trifluoroacetic acid led to corresponding ...
Antonevich, I. P., Katok, Ya. M., Nesterova, S. V.   +2 more
core  

A Versatile Iron-Catalyzed Protocol for the One-Pot Synthesis of Isoxazoles or Isoxazolines from the Same Propargylic Alcohols

, 2010
International audienceThe use N-sulfonyl-protected hydroxylamines as bi-nucleophiles in iron-catalyzed propargylic substitutions allows the selective one-pot synthesis of four classes of substituted isoxazoles or isoxazolines from the same propargylic ...
Olivier Debleds, Ostaszuk, Emilie, Jean-Marc Campagne, Emilie Ostaszuk, Emmanuel Vrancken, Debleds, Olivier, Campagne, Jean-Marc, Gayon, Eric, Eric Gayon, Vrancken, Emmanuel   +9 more
core   +1 more source

Isoxazoline Herbicides

Japanese Journal of Pesticide Science, 2014
Masao Nakatani, Minoru Ito, Yoshitaka Tanetani   +2 more
openaire   +2 more sources

Efficiency of fluralaner pour-on in different strategic control protocols against Rhipicephalus microplus on Brangus cattle in a tropical area

Parasites & Vectors
Background The occurrence of higher winter temperatures in Brazilian areas with tropical and highland climates may result in a fifth peak of tick populations during winter in addition to the four generations previously described.
Guilherme Henrique Reckziegel, Mariana Green de Freitas, Juliane Francielle Tutija, Vinícius Duarte Rodrigues, Dyego Gonçalves Lino Borges, Murilo Damasceno Brunet de Freitas, Tiago Gallina, Welber Daniel Zanetti Lopes, Daniel de Castro Rodrigues, Heitor de Oliveira Arriero Amaral, Tom Strydom, Siddhartha Torres, Fernando de Almeida Borges   +12 more
doaj   +1 more source