Synthesis and biological activity of N,N-dialkylaminoalkyl-substituted bisindolyl and diphenyl pyrazolone derivatives
摘要:
New Compounds, structurally related to the potent protein kinase C inhibitor staurosporine, with a bisindolylpyrazolone framework and Substituted oil the pyrazolone nitrogens with N,N-dialkylarninoalkyl side chain, were synthesized and evaluated for growth-inhibitory properties in several human cell lines. Many showed inhibition of TNF-alpha production in response to the tumor promoter TPA on HL-60 cells. The apoptotic activity on HcLa cells has been examined for several of these compounds. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis and biological activity of N,N-dialkylaminoalkyl-substituted bisindolyl and diphenyl pyrazolone derivatives
摘要:
New Compounds, structurally related to the potent protein kinase C inhibitor staurosporine, with a bisindolylpyrazolone framework and Substituted oil the pyrazolone nitrogens with N,N-dialkylarninoalkyl side chain, were synthesized and evaluated for growth-inhibitory properties in several human cell lines. Many showed inhibition of TNF-alpha production in response to the tumor promoter TPA on HL-60 cells. The apoptotic activity on HcLa cells has been examined for several of these compounds. (c) 2005 Elsevier Ltd. All rights reserved.
An efficient entry into pyrazol-3-ones is described starting from propenoic acids that were first transformed into the corresponding hydrazides. Oxidation of the hydrazides gave the diazenes and the latter cyclized to pyrazol-3-ones on treatment with ZrCl4. The methoxycarbonyl protection of the N-1 of the pyrazolone derivatives was easily removed under mild reaction conditions.
[3 + 2]-Cycloadditions of Azomethine Imines and Ynolates
作者:Sarah E. Winterton、Joseph M. Ready
DOI:10.1021/acs.orglett.6b01104
日期:2016.6.3
A novel [3 + 2]-cycloaddition between azomethine imines and lithium ynolates is described to synthesize bicyclic pyrazolidinones. These bicyclic pyrazolidinones are versatile intermediates to form β-amino acids and monocyclic pyrazolidinones. High diastereoselectivity and stereospecificity allow access to optically active products.
The present invention provides pyrazole and pyrazolone derivatives. Preferred compounds of the invention are useful as RNA polymerase inhibitors. Further preferred compounds of the invention are useful as antimicrobial agents.
作者:Sandrine Guillou、Olivier Nesmes、Mikhail S. Ermolenko、Yves L. Janin
DOI:10.1016/j.tet.2009.01.109
日期:2009.4
Following the study of the alkoxypyrazoles nitrogen's reactivitytoward arylation or alkylation reactions, we report here our results on the introduction of various aryl groups on carbon 4 position of 3-alkoxypyrazoles. This was achieved from the corresponding 4-halogeno derivatives via a Suzuki–Miyaura aryl–aryl coupling reaction. The unexpected difficulties (lack of reactivity or unwanted halogen