Development of piperazine-tethered heterodimers as potent antimalarials against chloroquine-resistant P. falciparum strains. Synthesis and molecular modeling
摘要:
The design, synthesis, and antiplasmodial activity of antimalarial heterodimers based on the 1,4-bis(3-aminopropyl)piperazine linker is reported. In this series key structural elements derived from quinoline antimalarials were coupled to fragments capable of coordinating metal ions. Biological evaluation included determination of activity against chloroquine-sensitive and chloroquine-resistant Plasmodiunifaleiparum strains. Some of the novel compounds presented high activity in vitro against chloroquine-resistant strains, more potent than chloroquine and clotrimazole. Computational studies revealed that the activity is likely due to the ability of the compounds to assume a multisite iron coordinating geometry. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of carbonylated heteroaromatic compounds via visible-light-driven intramolecular decarboxylative cyclization of o-alkynylated carboxylic acids
An efficient strategy for the easy access to carbonylated heteroaromatic compounds has been developed via a visible-light-promoted intramolecular decarboxylative cyclization reaction of o-alkynylated carboxylic acids. This method is characterized by its benign conditions and the tolerance to a wide range of functionalities.
1-Aryl-3-azabicyclo[3.1.0]hexanes, a new series of nonnarcotic analgesic agents
作者:Joseph W. Epstein、Herbert J. Brabander、William J. Fanshawe、Corris M. Hofmann、Thomas C. McKenzie、Sidney R. Safir、Arnold C. Osterberg、D. B. Cosulich、F. M. Lovell
DOI:10.1021/jm00137a002
日期:1981.5
of 19, followed by base hydrolysis of the amide 25. The greatest analgesic potency in mouse writhing and rat paw-pain assays was observed for para-substituted compounds. Bicifadine, 1-(4-methylphenyl)-3-azabicyclo[3.1.0]hexane (2b), was the most potent member of the series and is presently undergoing clinical trials in man. Analgesic activity of 2b is limited to the (+) enantiomer 2v, which has the
Alkynyl containing hydroxamic acid compounds as matrix metalloproteinase and tace inhibitors
申请人:American Cyanamid Company
公开号:US06340691B1
公开(公告)日:2002-01-22
Compounds of the formula
are useful in treating disease conditions mediated by TNF-&agr;, such as rheumatoid arthritis, osteoarthritis, sepsis, AIDS, ulcerative colitis, multiple sclerosis, Crohn's disease and degenerative cartilage loss.
Clear cut: For the title reaction, O2, the ideal oxidant, was used as the only oxidizing reagent. The dimer intermediate (see scheme) and isotopic labeling control experiments with 18O2 partially disclosed the reaction mechanism.
清晰:对于标题反应,使用理想的氧化剂O 2作为唯一的氧化剂。用18 O 2进行的二聚体中间体(参见方案)和同位素标记对照实验部分揭示了反应机理。
Specific Targeting Highly Conserved Residues in the HIV-1 Reverse Transcriptase Primer Grip Region. Design, Synthesis, and Biological Evaluation of Novel, Potent, and Broad Spectrum NNRTIs with Antiviral Activity
human immunodeficiency virus type 1 (HIV-1) nonnucleoside reverse transcriptase (RT) inhibitors (NNRTIs) whose prototype is 5. Molecular modeling studies based on the X-ray structures of HIV-1 RT prompted the synthesis of novel analogues which were tested as anti-HIV agents. The PBO derivatives specifically designed to target the highlyconserved amino acid residues within the beta12-beta13 hairpin, namely