3,4-Disubstituted 4-deazatoxoflavin derivatives (II) were prepared by the condensation of 6-(1-methylhydrazino)uracils (I) with appropriate α-diketones. The compounds II oxidized long-chain alkylamines such as n-octylamine and n-dodecylamine besides benzylamine and cyclohexylamine to yield the corresponding carbonyl compounds via imines, catalytically with a markedly high turnover number.
3,4-二取代的 4-脱氮氧代黄素衍生物 (II) 是通过 6-(1-甲基肼基) 尿嘧啶 (I) 与适当的 α-二酮缩合制备的。除了苄胺和环己胺外,化合物II氧化长链烷基胺如正辛胺和正十二胺,通过亚胺产生相应的羰基化合物,催化转化率显着高。
Sakuma, Yoshiharu; Nagamatsu, Tomohisa; Hashiguchi, Yuko, Chemical and pharmaceutical bulletin, 1984, vol. 32, # 3, p. 851 - 859
[EN] INHIBITORS OF CYSTATHIONINE BETA SYNTHASE TO REDUCE THE NEUROTOXIC OVERPRODUCTION OF ENDOGENOUS HYDROGEN SULFIDE<br/>[FR] INHIBITEURS DE CYSTATHIONINE BÊTA-SYNTHASE POUR RÉDUIRE LA SURPRODUCTION NEUROTOXIQUE DE SULFURE D'HYDROGÈNE ENDOGÈNE
申请人:FOND JEROME LEJEUNE
公开号:WO2010072807A2
公开(公告)日:2010-07-01
The invention is directed to inhibitors of cystathionine beta synthase which, among other biochemical effects, allow reduction of the neurotoxic overproduction of endogenous hydrogen sulphide. These compounds and pharmaceutical compositions containing them are useful for the prevention and treatment of neurotoxic and cognitive disorders such as cognitive disorders in Down syndrome. The invention also relates to methods for preventing or treating neurotoxic and cognitive disorders including cognitive disorders in Down Syndrome.
Toxoflavins and Deazaflavins as the First Reported Selective Small Molecule Inhibitors of Tyrosyl-DNA Phosphodiesterase II
作者:Ali Raoof、Paul Depledge、Niall M. Hamilton、Nicola S. Hamilton、James R. Hitchin、Gemma V. Hopkins、Allan M. Jordan、Laura A. Maguire、Alison E. McGonagle、Daniel P. Mould、Mathew Rushbrooke、Helen F. Small、Kate M. Smith、Graeme J. Thomson、Fabrice Turlais、Ian D. Waddell、Bohdan Waszkowycz、Amanda J. Watson、Donald J. Ogilvie
DOI:10.1021/jm400568p
日期:2013.8.22
The recently discovered enzyme tyrosyl-DNA phosphodiesterase 2 (TDP2) has been implicated in the topoisomerase-mediated repair of DNA damage. In the clinical setting, it has been hypothesized that TDP2 may mediate drug resistance to topoisomerase II (topo II) inhibition by etoposide. Therefore, selective pharmacological inhibition of TDP2 is proposed as a novel approach to overcome intrinsic or acquired resistance to topo II-targeted drug therapy. Following a high-throughput screening (HTS) campaign, toxoflavins and deazaflavins were identified as the first reported sub-micromolar and selective inhibitors of this enzyme. Toxoflavin derivatives appeared to exhibit a clear structure-activity relationship (SAP.) for TDP2 enzymatic inhibition. However, we observed a key redox liability of this series, and this, alongside early in vitro drug metabolism and pharmacokinetics (DMPK) issues, precluded further exploration. The deazaflavins were developed from a singleton HTS hit. This series showed distinct SAR and did not display redox activity; however low cell permeability proved to be a challenge.