Targeting breast cancer stem cells by novel HDAC3-selective inhibitors
摘要:
Although histone deacetylase (HDAC) inhibitors have been known to suppress the cancer stem cell (CSC) population in multiple types of cancer cells, it remains unclear which HDAC isoforms and corresponding mechanisms contribute to this anti-CSC activity. Pursuant to our previous finding that HDAC8 regulates CSCs in triple-negative breast cancer (TNBC) cells by targeting Notch1 stability, we investigated related pathways and found HDAC3 to be mechanistically linked to CSC homeostasis by increasing beta-catenin expression through the Akt/GSM3 beta pathway. Accordingly, we used a pan-HDAC inhibitor, AR-42 (1), as a scaffold to develop HDAC3-selective inhibitors, obtaining the proof-of-concept with 18 and 28. These two derivatives exhibited high potency and isoform selectivity in HDAC3 inhibition. Equally important, they showed in vitro and/or in vivo efficacy in suppressing the CSC subpopulation of TNBC cells via the downregulation of beta-catenin. (C) 2017 Elsevier Masson SAS. All rights reserved.
[EN] HDAC3-SELECTIVE INHIBITORS<br/>[FR] INHIBITEURS SÉLECTIFS DE HDAC3
申请人:OHIO STATE INNOVATION FOUNDATION
公开号:WO2018223122A1
公开(公告)日:2018-12-06
Disclosed herein are selective HDAC inhibitors. In some embodiments, the compounds are selective HDAC3 inhibitors. The compounds are useful to treat a variety of conditions, including cancers, i.e., breast cancer, cachexia, and liver steatosis.
Intermediate formation enabled regioselective access to amide in the Pd-catalyzed reductive aminocarbonylation of olefin with nitroarene
作者:Li Yang、Lijun Shi、Chungu Xia、Fuwei Li
DOI:10.1016/s1872-2067(20)63561-6
日期:2020.7
reductive aminocarbonylation of olefins with nitroarenes was developed using carbon monoxide (CO) as both reductant and carbonyl source, which enables facile access to amides with excellent regioselectivity and broad substrate scope. It is found that the counter anions of the Pd catalyst precursors significantly affect the reaction chemoselectivity and amide regioselectivity. Branched amides were mainly
摘要 以一氧化碳 (CO) 作为还原剂和羰基源,开发了一种钯催化烯烃与硝基芳烃还原氨基羰基化的有效途径,该途径可以轻松获得具有优异区域选择性和广泛底物范围的酰胺。发现Pd催化剂前体的抗衡阴离子显着影响反应化学选择性和酰胺区域选择性。支链酰胺主要以K2PdCl4为金属催化剂得到,膦配体对区域选择性没有影响,但影响催化反应活性。然而,当使用 Pd(CH3CN)4(OTf)2 时,膦配体对氨基羰基化区域选择性有显着影响;单齿膦倾向于形成支链酰胺,而双齿膦主要形成线性酰胺。从硝基芳烃还原的所有可能的 N 物种的捕获实验、初级动力学研究和控制反应表明,支链和线性酰胺的催化合成分别产生了氮烯(进一步转化为烯酰胺)和苯胺,这与之前的配体控制的区域选择性不同通过烯烃与胺的氨基羰基化合成酰胺。此外,所提出的合成路线可用于在温和条件下合成克级丙腈。与以前通过烯烃与胺的氨基羰基化合成酰胺的配体控制的区域选择性不
Copper‐Catalyzed Oxidative Benzylic C(sp
<sup>3</sup>
)−H Cyclization for the Synthesis of β‐Lactams
oxidative C(sp3 )-H amidation for the synthesis of β -lactams using t BuOO t Bu. This method is based on Kharasch-Sosnovsky amidation and does not require prefunctionalization of C(sp3 )-Hbonds or the installation of a directing group, thereby allowing for the straightforward synthesis of β -lactams. Our intramolecular functionalization protocol can be extended to diverse benzylicC(sp3 )-Hbonds and
β-内酰胺由于在天然产物和药物中普遍存在而成为重要的结构基序。我们在此报告了使用t BuOO t Bu合成β-内酰胺的Cu催化的分子内氧化C(sp 3)-H酰胺化反应。该方法基于Kharasch-Sosnovsky酰胺化,不需要C(sp 3)-H键的预功能化或定向基团的安装,从而可以直接合成β-内酰胺。我们的分子内功能化协议可以扩展到各种苄基C(sp 3)-H键,并显示出色的官能团耐受性。
Oxindole hydrazide modulators of protein tyrosine phosphatases (ptps)
申请人:Bombrun Agnes
公开号:US20050043388A1
公开(公告)日:2005-02-24
The present invention is related to the use of oxindole hydrazide derivatives of formula (I) for the treatment and/or prevention of metabolic disorders mediated by insulin resistance or hyperglycemia, comprising diabetes type I and/or II, inadequate glucose tolerance, insulin resistance, hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, obesity, polycystic ovary syndrome (PCOS). In particular, the present invention is related to the use of oxindole hydrazide derivatives of formula (I) to modulate, notably to inhibit the activity of PTPs, in particular of PTP1B, TC-PTP, SHP and GLEPP-1. The present invention is furthermore related to novel oxindole hydrazide derivatives and method of preparation thereof.(I).
OXINDOLE HYDRAZIDE MODULATORS OF PROTEIN TYROSINE PHOSPHATASES (PTPS)
申请人:BOMBRUN Agnes
公开号:US20100168101A1
公开(公告)日:2010-07-01
The present invention is related to the use of oxindole hydrazide derivatives of formula (I) for the treatment and/or prevention of metabolic disorders mediated by insulin resistance or hyperglycemia, comprising diabetes type I and/or II, inadequate glucose tolerance, insulin resistance, hyperlipidemia, hypertriglyceridemia, hypercholesterolemia, obesity, polycystic ovary syndrome (PCOS). In particular, the present invention is related to the use of oxindole hydrazide derivatives of formula (I) to modulate, notably to inhibit the activity of PTPs, in particular of PTP1B, TC-PTP, SHP and GLEPP-1. The present invention is furthermore related to novel oxindole hydrazide derivatives and method of preparation thereof.