Results 101 to 110 of about 3,055 (208)

Synthesis and Antimicrobial Studies of Some Novel Pyrazoline and Isoxazoline Derivatives

open access: yesE-Journal of Chemistry, 2009
A new series of 1H-3-(4’-substituted phenyl)-5-(6’’-methoxy napthaline)-2-pyrazolines (4a-e) and 1H-3-(4’-substituted phenyl)-5-(6’’-methoxynapthaline)-2-isoxazolines (5a-e) were synthesized by reacting 1-(4’-substituted phenyl)-3-(6’’-methoxynapthaline)-
S. B. jadhav   +3 more
doaj   +1 more source

Synthesis and Reactivity of Acyclic (pentadienyl)iron(1+) Cations: Model Studies for the Preparation of the 8\u3cem\u3eE\u3c/em\u3e,10\u3cem\u3eZ\u3c/em\u3e,16\u3cem\u3eE\u3c/em\u3e,18\u3cem\u3eE\u3c/em\u3e-Tetraene Segment of Macrolactin A [PDF]

open access: yes, 1999
The dicarbonyl(1,2-dimethylpentadienyl)triphenylphosphineiron(1+) cation (11) has been prepared from methyl 4-methyl-2E,4E-hexadienoate in four steps.
Donaldson, William   +2 more
core   +1 more source

Взаимодействие (2-фторфенил)- и (4фторфенил)-(2-нитрометилциклопентил)метанона с фенилацетиленом [PDF]

open access: yes, 2015
В результате реакции 1,3-диполярного циклоприсоеднения фенилацетилена и нитрилоксидов, генерируемых из (2-фторфенил)или (4-фторфенил)-(2-нитрометилциклопентил)метанона под действием фенилизоцианата, осуществлен синтез соответствующих изоксазолов и ...
Антоневич, Инесса Петровна   +2 more
core  

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

open access: yesAdvanced 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   +4 more
doaj   +1 more source

Синтез некоторых фторфенильных 4-оксоциклопента[d]изоксазолинов и их диоксолановых производных [PDF]

open access: yes, 2013
Осуществлен синтез ряда новых фторфенильных 4-оксоциклопента[d]изоксазолинов и их диоксолановых производных. Синтезированные соединения являются предшественниками циклических ?-трикетонов, которые представляют интерес как потенциальные биологически ...
Антоневич, Инесса Петровна   +1 more
core  

Synthesis of some isoxazoline, isoxazole and pyrazole carboxylic acids as the precursors of new 1,2-diacyl-1-alkylhydrazines [PDF]

open access: yes, 2013
A number of isoxazoline, isoxazole and pyrazole carboxylic acids or their esters has been synthesized via the 1,3-dipolar cycloaddition of corresponding nitrile oxides or diazomethane to unsaturated dipolarophiles.
Antonevich, I. P., Katok, Ya. M.
core  

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]

open access: yesJournal 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  

Isoxazoline Herbicides

open access: yesJapanese Journal of Pesticide Science, 2014
Masao Nakatani   +2 more
openaire   +2 more sources

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

open access: yesMolecules
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   +9 more
doaj   +1 more source

Полупродукты получения жидкокристаллических и анизотропных материалов [PDF]

open access: yes, 2014
Рассмотрены полупродукты получения различных анизотропных и жидкокристаллических соединений и материалов. Показано, что хиральные и нехиральные нематические, смектические мезоморфные и анизотропные соединения могут быть получены ...
Безбородов, Владимир Степанович   +4 more
core  

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