Discovery and Structure–Activity Relationships of Pyrrolone Antimalarials
摘要:
In the pursuit of new antimalarial leads, a phenotypic screening of various commercially sourced compound libraries was undertaken by the World Health Organisation Programme for Research and Training in Tropical Diseases (WHO-TDR). We report here the detailed characterization of one of the hits from this process, TDR32750 (8a), which showed potent activity against Plasmodium falciparum K1 (EC50 similar to 9 nM), good selectivity (>2000-fold) compared to a mammalian cell line (L6), and significant activity against a rodent model of malaria when administered intraperitoneally. Structure-activity relationship studies have indicated ways in which the molecule could be optimized. This compound represents an exciting start point for a drug discovery program for the development of a novel antimalarial.
Titanocene, deren Verwendung und N-substituierte Pyrrole
申请人:CIBA-GEIGY AG
公开号:EP0318894A2
公开(公告)日:1989-06-07
Titanocene mit zwei 5-gliedrigen Cyclodienylgruppen, z.B. Cyclopentadienyt, und ein oder zwei 6-gliedrigen carbocyclischen oder 5- oder 6-gliedrigen heterocyclischen aromatischen Ringen, die in mindestens einer der beiden Orthostellungen zur Titankohlenstoffbindung mit einem Fluoratom substituiert sind und als weiteren Substituenten unsubstituiertes oder substituiertes 1-Pyrryl enthalten, eignen sich als Photoinitiatoren für die strahlungsinduzierte Polymerisation von ethylenisch ungesättigten Verbindungen.
Discovery, synthesis and SAR analysis of novel selective small molecule S1P4-R agonists based on a (2Z,5Z)-5-((pyrrol-3-yl)methylene)-3-alkyl-2-(alkylimino)thiazolidin-4-one chemotype
High affinity and selective S1P(4) receptor (S1P(4)-R) small molecule agonists may be important proof-of-principle tools used to clarify the receptor biological function and effects to assess the therapeutic potential of the S1P4-R in diverse disease areas including treatment of viral infections and thrombocytopenia. A high-throughput screening campaign of the Molecular Libraries-Small Molecule Repository was carried out by our laboratories and identified (2Z,5Z)-5-((1-(2-fluorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl)methylene)-3-methyl-2-(methylimino) thiazolidin-4-one as a promising S1P(4)-R agonist hit distinct from literature S1P(4)-R modulators. Rational chemical modifications of the hit allowed the identification of a promising lead molecule with low nanomolar S1P(4)-R agonist activity and exquisite selectivity over the other S1P(1-3,5)-Rs family members. The lead molecule herein disclosed constitutes a valuable pharmacological tool to explore the effects of the S1P(4)-R signaling cascade and elucidate the molecular basis of the receptor function. (C) 2011 Elsevier Ltd. All rights reserved.
Bose, D. Subhas; Srikanth, Bingi, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2016, vol. 55B, # 9, p. 1112 - 1116
作者:Bose, D. Subhas、Srikanth, Bingi
DOI:——
日期:——
Verfahren zur Herstellung von Titanocenen mit o,o'- Difluorarylliganden