Results 111 to 120 of about 5,382 (243)

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

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

, 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  

Regioselectivity of 1,3-dipolar cycloadditions and antimicrobial activity of isoxazoline, pyrrolo[3,4-d]isoxazole-4,6-diones, pyrazolo[3,4-d]pyridazines and pyrazolo[1,5-a]pyrimidines [PDF]

, 2016
Yasser H. Zaki, Abdelwahed R. Sayed, Shaaban A. Elroby   +2 more
openalex   +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  

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

, 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, Каток, Ядвига Марьяновна, Нестерова, Светлана Владимировна   +2 more
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

Annulation of Heterocycles via Ring Transformation of Isoxazoline-2-oxides by Lewis Acid

, 1993
Kazuho Harada, Kuniaki Sasaki, Eisuke Kaji, Shonosuke Zen   +3 more
openalex   +1 more source

Транс-гидроксилирование ряда циклопен-5ЕН[d]изоксазолинов [PDF]

, 2013
Титульная реакция была изучена как вариант функционализации циклопентанового кольца циклопент-5-ен[d]изоксазолинов ? ключевых интермедиатов в полном синтезе азоти кислородсодержащих простаноидов в рамках нитрилоксидного подхода.
Антоневич, Инесса Петровна, Нестерова, Светлана Владимировна   +1 more
core  

A practical conversion of 4-phenyl-2-isoxazoline-2-oxides into 3,3a,8,8a-tetrahydro-2-oxo-2H-furo[2,3-b]indoles via 1-oxido-3H-indole-3-acetate as a key intermediate.

, 1987
Eisuke Kaji, Kiyobumi Takahashi, M. Kitazawa, Shonosuke Zen   +3 more
openalex   +2 more sources

A Functional Protein Chip for Combinatorial Pathway Optimization and In Vitro Metabolic Engineering [PDF]

, 2004
Pathway optimization is, in general, a very demanding task due to the complex, nonlinear and largely unknown interactions of enzymes, regulators and metabolites.
Jung, Gyoo Yeol, Stephanopoulos, Gregory
core