Results 101 to 110 of about 7,470 (229)

Calixarene alpha-ketoacetylenes: versatile platforms for reaction with hydrazine nucleophile [PDF]

, 2018
Late stage diversification of calix[4]arenes and thiacalix[4]arenes with heterocycles remains a significant synthetic challenge and hampers further exploitation of the scaffolds.
Acharya, Bi, Bistri, Boersch, Bromidge, Burilov, Burilov, Cecioni, Chen, Creaven, Credi, Epifanova, Fasting, Gotzinger, Grandjean, Gutsche, Iwamoto, Karpov, Kim, Kumar, Kumar, Lamouchi, Lavendomme, Maher, Muravev, Muravev, Muravev, Muravev, Muravev, Muravev, Ovsyannikov, Rad, Roy, Savithri, Shen, Solovieva, Solovieva, Song, Takahashi, Thiabaud, Vasilevsky, Vicens, Wang, Wang, Wang, Wang, Yang, Yin   +47 more
core   +1 more source

Новый подход к синтезу пиразолсодержащих жидкокристаллических соединений [PDF]

, 2015
Разработан новый подход к синтезу пиразолсодержащих жидких кристаллов, который заключается во взаимодействии мезогенных 3-арил-3-кетоэфиров с 4-замещенными арилгидразинами.
Дорощук, Д. С., Ковганко, Владимир Николаевич, Ковганко, Н. Н.   +2 more
core  

Regioselective approach to 5-arylsulfonylisoxazoles and their antimicrobial activity

Beilstein Journal of Organic Chemistry
This study presents a novel regioselective synthesis of 3-electron-withdrawing-group-(EWG)-substituted 5-sulfonyl- and 5-sulfinylisoxazoles from 3-EWG-5-nitroisoxazoles via nucleophilic aromatic substitution with thiophenols followed by oxidation with m ...
Artem S. Sazonov, Dmitry A. Vasilenko, Denis V. Porfiriev, Yuri K. Grishin, Rimma A. Gazzaeva, Alisa P. Chernyshova, Maxim A. Kryakvin, Anna A. Baranova, Vera A. Alferova, Elena B. Averina   +9 more
doaj   +1 more source

Effects of Isoxazolyl Steroids on Key Genes of Sonic Hedgehog Cascade Expression in Tumor Cells

Molecules
Activation of the Hedgehog (Hh) signaling pathway is often associated with the progression of various types of cancer. The purpose of study was to search for inhibitors of the Hh signaling pathway among eight compounds belonging to the group of ...
Anna Aleksandrova, Arif Mekhtiev, Olga Timoshenko, Elena Kugaevskaya, Tatiana Gureeva, Alisa Gisina, Maria Zavialova, Kirill Scherbakov, Anton Rudovich, Vladimir Zhabinskii, Vladimir Khripach   +10 more
doaj   +1 more source

Synthesis of the omega-brominated alpha-trifluoroacetylcycloalkanones and their isoxazole derivatives

Journal of the Brazilian Chemical Society, 2006
The reactions of a serie of the 2-trifluoroacetyl-1-methoxy-1-cycloalkenes (1a-1e) and 2-trifluoroacetylcycloalkanones (2a-2e) with molecular bromine to obtain omega-bromo-alpha-trifluoroacetylcycloalkanones (3a-3e, 4a) is reported. Was determined that 2-
Flores Alex F. C., Peres Rodrigo L., Piovesan Luciana A., Flores Darlene C., Bonacorso Helio G., Martins Marcos A. P.   +5 more
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Microwave induced synthesis of some fused thiazoloquinazoline derivatives under solvent free conditions using LiBr as a catalyst [PDF]

Two rapid and efficient methods for the preparation off used thiazoloquinazoline derivatives by the reaction of chalcones with hydroxylamine, urea and hydrazine hydrate under solvent free condition and microwave exposure are reported.
Ameta, Chetna, Ameta, Rakshit, Ameta, Suresh, Punjabi, P., Tiwari, Urvashi   +4 more
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InCl3-​assisted synthesis and cytotoxic studies of some novel heteroaryl thiazoles [PDF]

, 2013
Heteroaryl thiazoles were synthesized by the Hantzsch reaction of various α-​bromoketones with aryl thioureas using InCl3 as a catalyst in a shorter reaction time. The synthesized compds.
Boggavarapu Chand, S.G., Boregowda Puttaraju, K., Kalegowda Shivashankar, ., Ramamohan Reddy, K., Rasal Vijaykumar, P., Venkata Vivek, P.N.   +5 more
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An Overview of Biological and Synthetic Aspects of Thiazole Derivatives in Heterocyclic Chemistry [PDF]

, 2016
These overviews signify a study covering the literature on thiazole derivatives in heterocyclic chemistry. This brief analysis as well provides a revise on current reports and demonstrates the utility and the effectiveness of this approach.
Jain, N. (Nidhi), Singh, B. (Bhawani)
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Studies with Arylhydrazono-3-oxopropanals:A novel route to synthesis of substituted pyrazoles, oxoalkanonitrile and glyoxalonitrile containing sulfa drug moieties [PDF]

, 2008
Coupling of enaminones 1 with diazonium salts gave thehydrazonopropanals 3a-h. Compound 3 react with ω-bromoacetophenone or α-chloroacetanilide to yield 5 and 8. These compounds were cyclized smoothly into 6 and 9 respectively.
Abdel Hafiz, I.S., Atalla, A.A., Elnagdi, M.H., Hussein, M., Ishak, E.A.   +4 more
core  

Molecular Structure of Heterocycles: 6. Solvent Effects on the 17O Nmr Chemical Shifts of 5-Trichloromethylisoxazoles

Journal of the Brazilian Chemical Society, 2001
A multilinear-regression analysis using the Kamlet-Abboud-Taft (KAT) solvatochromic parameters in order to elucidate and quantify the solvent effects on the 17O chemical shifts of three 5-trichloromethylisoxazoles [(1a) non-, (1b) 3-methyl- and (1c) 4 ...
Martins Marcos A. P., Freitag Rogério A., Zimmermanna Nilo E. K., Sinhorin Adilson P., Cúnico Wilson, Bastos Giovani P., Zanatta Nilo, Bonacorso Helio G.   +7 more
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