Novel cyclized Pifithrin-α p53 inactivators: synthesis and biological studies
摘要:
Starting from various cyclic or bicyclic ketones, we have synthesized novel Pifithrin-a analogues bearing different methyl substituted phenyl ketone groups at the N-3-position of the 2-iminothiazole heterocycle. From stability studies in a biological medium as well as under specific chemical conditions, we have shown by NMR techniques that through a dehydration process, some derivatives can generate their corresponding cyclized analogues. All of the new analogues, Pifithrin-like and polycyclic dehydrated derivatives were assessed for their p53 inactivation potency by measuring survival of cortical neurons, whose death was induced by the DNA-damaging agent etoposide. Pifithrin-alpha like 2f as well as the cyclic dehydrated 6b analogue were found to be one log more potent p53 inactivators than reference compound Pft-alpha, with EC50 values ranging around 30 nM. These results support the finding that p53 inactivation by Pft-alpha analogues could be also due to the presence of the cyclic dehydrated Pft-alpha forms, generated in situ in the biological assay incubation medium. (c) 2005 Elsevier Ltd. All rights reserved.
[EN] UTILIZATION OF NITRILES AS ANTIMICROBIAL AGENTS
申请人:HENKEL KOMMANDITGESELLSCHAFT AUF AKTIEN
公开号:WO1986006254A1
公开(公告)日:1986-11-06
(EN) 2,2-dibromine-3-oxonitriles have the formula (I), R-CO-CBr2-CN, wherein R is an aliphatic, cycloaliphatic, aromatic or heterocyclic, optionally substituted residue. Said nitriles are used as antimicrobial agents.(FR) Des 2,2-dibrome-3-oxonitriles ont la formule (I): R-CO-CBr2-CN, dans laquelle R représente un résidu aliphatique, cycloaliphatique, aromatique ou hétérocyclique, substitué le cas échéant. Ces nitriles sont utilisés comme agents anti-microbiens.