Pleuromutilin derivatives having a purine ring. Part 1: New compounds with promising antibacterial activity against resistant Gram-positive pathogens
摘要:
In the course of our research aimed at the discovery of metabolic stable pleuromutilin derivatives with more potent antibacterial activity against Gram-positive pathogens than previous analogues, a series of compounds bearing a purine ring were prepared and evaluated. From SAR studies, we identified two promising compounds 85 and 87, which have excellent in vitro activity against a number of Gram-positive pathogens, including existing drug-resistant strains, and potent in vivo efficacy. (C) 2008 Elsevier Ltd. All rights reserved.
SUBSTITUTED 2-(9H-PURIN-9-YL) ACETIC ACID ANALOGUES AS INHIBITORS OF STAT3
申请人:Turkson James
公开号:US20130172340A1
公开(公告)日:2013-07-04
In one aspect, the invention relates to substituted purine analogs, derivatives thereof, and related compounds, which are useful as inhibitors of STAT protein activity; synthetic methods for making the compounds; pharmaceutical compositions comprising the compounds; and methods of treating disorders of uncontrolled cellular proliferation associated with a STAT protein activity dysfunction using the compounds and compositions. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Metal-free direct C-6–H alkylation of purines and purine nucleosides enabled by oxidative homolysis of 4-alkyl-1,4-dihydropyridines at room temperature
Herein we report the application of 4-alkyl-1,4-dihydropyridines (DHPs), which are easily prepared from inexpensive aldehydes in one step, for the direct site-specific C–H alkylation of purines and purine nucleosides. Despite there being three active C(sp2)–H bonds (C-2–H, C-6–H, and C-8–H) in the structure, the reactions still show high regioselectivity at the purinyl C-6–H position. Importantly,
COMPOSITIONS AND METHODS FOR INIHIBITING TUMORIGENICITY OF SENESCENT CANCER CELLS INDUCED BY CHEMOTHERAPY
申请人:INSERM (INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE)
公开号:US20150056195A1
公开(公告)日:2015-02-26
The invention relates to the field of oncology and to chemotherapy resistance and relapse. Thus the invention provides compositions and methods for inhibiting tumorigenicity of senescent cancer cells induced by a chemotherapeutic agent. The invention also provides compositions and methods for inhibiting conversion of non-stem cancer cells (non-CSCs) into tumor initiating cancer stem cells (CSCs) induced by a chemotherapeutic agent.