Applications of 2-arylhydrazononitriles in synthesis: Preparation of new indole containing 1,2,3-triazole, pyrazole and pyrazolo[1,5-a]pyrimidine derivatives and evaluation of their antimicrobial activities
reactions with enaminones 15 afford 17. Finally, compound 5 reacts with cinnamaldehyde to yield the corresponding Schiff’s base 18 that does not undergo cyclization to form the pyridine derivative 19. The activities of all new substances synthesized in this investigation were evaluated against a panel of microbial organisms. The results show that 4a, 4b, 5b and 9b display strong antimicrobial activities
Synthesis of extended conjugated indolyl chalcones as potent anti-breast cancer, anti-inflammatory and antioxidant agents
作者:Pravin S. Bhale、Hemant V. Chavan、Sakharam B. Dongare、Sadanand N. Shringare、Yoginath B. Mule、Samadhan S. Nagane、Babasaheb P. Bandgar
DOI:10.1016/j.bmcl.2017.02.052
日期:2017.4
they possess high anti-tumoractivities. Among them, compound 5e and 5a demonstrated excellent activity against breast carcinoma (GI50 <0.1 and 4μM respectively) as good as adriamycin (GI50 <0.1μM). The compounds were also screened against the normal Vero monkey cell line, which showed moderate selectivity against inhibition of cancer cells. The effect of extended conjugation on activity authenticated
New derivatives of polyfunctional pyrazolo[3,4-b]pyridines were synthesised via a regioselective one-pot three-component reaction of 3- (cyanoacetyl)indole, 5-amino-3-methylpyrazole and arylaldehydes in excellent yields using Fe3+-montmorillonite as a reusable catalyst under conventional conditions and ultrasonic irradiation. In particular, valuable features of this method include high reaction rate
[EN] THIENO [2, 3-B] PYRIDINE DERIVATIVES AS VIRAL REPLICATION INHIBITORS<br/>[FR] DÉRIVÉS DE LA THIÉNO [2, 3-B] PYRIDINE EN TANT QU'INHIBITEURS DE RÉPLICATION VIRALE
申请人:UNIV LEUVEN KATH
公开号:WO2010130842A1
公开(公告)日:2010-11-18
The present invention relates to a series of compounds of formula (A) having antiviral activity, more specifically HIV (Human Immunodeficiency Virus) replication inhibiting properties. The invention also relates to methods for the preparation of such compounds, as well as to novel intermediates useful in one or more steps of such syntheses. The invention also relates to pharmaceutical compositions comprising an effective amount of such compounds as active ingredients. This invention further relates to the use of such compounds as medicines or in the manufacture of a medicament useful for the treatment of animals suffering from viral infections, in particular HIV infection. This invention further relates to methods for the treatment of viral infections in animals by the administration of a therapeutical amount of such compounds, optionally combined with one or more other drugs having anti-viral activity.
Synthesis of A New Class of Pyridazin-3-one and 2-Amino-5-arylazopyridine Derivatives and Their Utility in the Synthesis of Fused Azines
作者:Hamada Ibrahim、Haider Behbehani
DOI:10.3390/molecules19022637
日期:——
A general route for the synthesis of a novel class of pyridazin-3-one derivatives 3 by the reaction in acetic anhydride between 3-oxo-2-arylhydrazonopropanals 1 and some active methylene compounds like p-nitrophenylacetic acid and cyanoacetic acid was established. Under these conditions the pyridazin-3-one derivatives 3 were formed as the sole isolable products in excellent yield. The 6-acetyl-3-oxopyridazine derivative 3l was reacted with DMF-DMA to afford the corresponding enaminone derivative 4, which reacts with a variety of aminoazoles to afford the corresponding azolo[1,5-a]pyrimidine derivatives 5–7. Also, in order to explore the viability and generality of a recently uncovered reaction between 3-oxo-2-arylhydrazonopropanals and active methylene compounds, a variety of 2-amino-6-aryl-5-arylazo-3-aroylpyridines 16–19 were prepared by reacting 3-oxo-2-arylhydrazonopropanals with miscellaneous active methylene compounds like 3-oxo-3-phenylpropionitrile, hetaroylacetonitriles and cyanoacetamides. These 2-aminopyridine derivatives undergo smooth reactions with cyanoacetic acid that led to the formation in high yield of a new class of 1,8-naphthyridine derivatives 24. The structures of all new substances prepared in this investigation were determined by the different analytical spectroscopic methods, in addition to the X-ray crystallographic analysis.