Results 81 to 90 of about 132,796 (171)

Synthesis and Antibacterial Activities of Novel 2,5-Diphenylindolo[2,3-e] Pyrazolo[1',5':3",4"]pyrimido[2",1"-c] [1,2,4]triazines

Molecules, 2011
The formation of (E)-3-{2-(2,5-diphenylpyrazolo[1,5-c]pyrimidin-7-yl)hydrazono}indolin-2-ones 3 has been achieved by condensation of equimolar amounts of 7-hydrazino-2,5-diphenylpyrazolo[1,5-c]pyrimidine (1) and isatin (or isatin derivatives) 2 at room ...
Mohamed G. Marei, Kamal F.M. Atta, Somaya M. Ghobashy, Omaima O.M. Farahat   +3 more
doaj   +1 more source

Studies on Ring-opening of Heterocyclic Compounds. III. Alternative Preparation of Isoquinoline N-Oxide and N-Imine

, 1971
Isoquinoline N-oxide (5) and N-imine (8) were prepared by ring-opening reactions of quarternary isoquinolinium salts and successive ring-closures. The ring-opening reaction of N-(2, 4-dinitrophenyl) isoquinolinium chloride (1) with hydroxylamine gave o ...
Y. Tamura, N. Tsujimoto, M. Uchimura
semanticscholar   +1 more source

Synthesis of 2-Mercapto-(2-Oxoindolin-3-Ylidene)Acetonitriles from 3-(4-Chloro-5H-1,2,3-Dithiazol-5-Ylidene)Indolin-2-ones

Molecules, 2018
Alkylidene oxindoles are important functional moieties and building blocks in pharmaceutical and synthetic chemistry. Our interest in biologically active compounds focused our studies on the synthesis of novel oxindoles, bearing on the exocyclic double ...
Boris Letribot, Régis Delatouche, Hervé Rouillard, Antoine Bonnet, Jean-René Chérouvrier, Lisianne Domon, Thierry Besson, Valérie Thiéry   +7 more
doaj   +1 more source

3-(2-Acetamidophenyl)sydnone

Acta Crystallographica Section E, 2009
Sydnones are unusual mesoionic compounds containing a five-membered heterocyclic ring. Generally for stability, substitution at the N-3 position by an aromatic fragment is necessary.
doaj   +1 more source

Synthesis of Novel Trisubstituted Olefin-Type Probe Molecules Containing N-Heterocycles and Their Application in Detection of Malononitrile

Organics
Recently, the construction of the trisubstituted olefin-type probe molecules has elicited the attention of many researchers. However, the synthesis of the trisubstituted olefin-type probes containing two N-heterocycles simultaneously has been rarely ...
Zhao-Hua Chen, Shi-Wei Yu, Wen-Jin Xu, Miao-Xin Li, Yong Zeng, Si-Wei Deng, Jian-Yun Lin, Zhao-Yang Wang   +7 more
doaj   +1 more source

Editorial: Five-membered ring heterocyclic compounds as anticancer drug candidates. [PDF]

Front Chem
Mermer A, Orhan İE, Ye G, Kumar NA, Danac R.   +4 more
europepmc   +1 more source

Excavating medicinal virtues of chalcones to illuminate a new scope in cancer chemotherapy. [PDF]

RSC Adv
T N, Roy N, Paira P, Chakrabarty R.
europepmc   +1 more source

Catalyst-free synthesis of 1,2,3-triazole-N-oxide derivatives using <i>tert</i>-butyl nitrite: a novel strategy and synthetic applications. [PDF]

RSC Adv
Perumal K, Shanthi M, Hemamalini V, Shankar B, Ramesh S.   +4 more
europepmc   +1 more source

Prediction of Fragmentation Pathway of Natural Products, Antibiotics, and Pesticides by ChemFrag. [PDF]

J Mass Spectrom
Schüler JA, Kramell AE, Schmidt A, Walesch PD, Csuk R.   +4 more
europepmc   +1 more source

Therapeutic Role of Heterocyclic Compounds in Neurodegenerative Diseases: Insights from Alzheimer's and Parkinson's Diseases. [PDF]

Neurol Int
Puranik N, Song M.
europepmc   +1 more source