Synthesis and Biological Evaluation ofortho-ArylN-Hydroxycinnamides as Potent Histone Deacetylase (HDAC) 8 Isoform-Selective Inhibitors
摘要:
AbstractHistone deacetylases (HDACs) are a family of enzymes that play a crucial role in biological process and diseases. In contrast to other isozymes, HDAC8 is uniquely incapable of histone acetylation. In order to delineate its physiological function, we developed HDAC8‐selective inhibitors using knowledge‐based design combined with structural modeling techniques. Enzyme inhibitory analysis demonstrated that some of the resulting compounds (22 b, 22 d, 22 f, and 22 g) exhibited anti‐HDAC8 activity superior to PCI34051, a known HDAC8‐specific inhibitor, with IC50 values in the range of 5–50 nM. Among them, compound 22 d showed antiproliferative effects toward several human lung cancer cell lines (A549, H1299, and CL1‐5); it exhibited cytotoxicity against human lung CL1‐5 cells similar to that of SAHA yet without significant cytotoxicity for normal IMR‐90 cells. Expression profiling of HDAC isoforms in three cancer cell lines indicated that the HDAC8 level in CL1‐5 is higher than that in H1299 and CL1‐1 cells, a result consistent with the differential cytotoxicity of compound 22 d. These results suggest the effectiveness of our design concept, which may lead to a tool compound for studying the specific role of HDAC8 in cellular biological processes.
Visible-light promoted oxidative cyclization of cinnamic acid derivatives using xanthone as the photocatalyst
作者:Bin Zhao、Bo Xu
DOI:10.1039/d0ob02417a
日期:——
coumarin derivatives via a tandem double bond isomerization/oxidative cyclization of cinnamic acids. Inexpensive and stable xanthone was used as the photocatalyst, and readily available Selectfluor was used as the oxidant. This method tolerates a wide range of functional groups and offers excellent chemical yields in general. Besides, the photocatalytic oxidative cyclization of cinnamic acid esters gives
Structure−Activity Relationship and Molecular Mechanisms of Ethyl 2-Amino-4-(2-ethoxy-2-oxoethyl)-6-phenyl-4<i>H</i>-chromene-3-carboxylate (sHA 14-1) and Its Analogues
作者:Sonia G. Das、Jignesh M. Doshi、Defeng Tian、Sadiya N. Addo、Balasubramanian Srinivasan、David L. Hermanson、Chengguo Xing
DOI:10.1021/jm9005059
日期:2009.10.8
excitingly, our studies of 5q in camptothecin (CCRF-CEM/C2) and mitoxantrone (HL-60/MX2) resistant cancer cells highlight its ability to selectively kill drug-resistant cells over parent cancer cells. 5q inhibits tumor cell growth through the induction of apoptosis, with detailed mechanism of its selectivity toward drug-resistant cancer cells under investigation. These results suggest that 5q is a promising
One-pot catalysis of dehydrogenation of cyclohexanones to phenols and oxidative Heck coupling: expedient synthesis of coumarins
作者:Donghee Kim、Minsik Min、Sungwoo Hong
DOI:10.1039/c3cc41296b
日期:——
One-pot reactions leading to highly functionalized coumarins have been developed via a Pd(II)-catalyzed dehydrogenation-oxidative Heck-cyclization process.
通过Pd(II)催化的脱氢-氧化Heck环化过程已经开发出了导致高度功能化香豆素的一锅法反应。
Bichromatic Photosynthesis of Coumarins by UV Filter-Enabled Olefin Metathesis
作者:Or Eivgi、Revannath L. Sutar、Ofer Reany、N. Gabriel Lemcoff
DOI:10.1002/adsc.201700316
日期:2017.7.17
Herein, we report on a two-step bichromatic synthesis of coumarins involving UV-A and UV-C light. The first step is a UV-A-photoinduced ruthenium-catalyzedcross-metathesis (CM) reaction of 2-nitrobenzyl-protected 2-hydroxystyrenes with acrylates, using an external solution of 1-pyrenecarboxaldehyde as a UV filter. Irradiation in the absence of the filter permanently inhibits the light-activated catalyst
ORGANIC LIGHT-EMITTING DEVICE INCLUDING FLUORESCENT COMPOUND AND FLUORESCENT COMPOUND
申请人:Samsung Electronics Co., Ltd.
公开号:US20190074445A1
公开(公告)日:2019-03-07
An organic light-emitting device comprising: a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an emission layer and a fluorescent compound, wherein the fluorescent compound comprises a
3
n-π*-to-
1
π-π* energy transition from a
3
n-π* excited state to a
1
π-π* excited state, an energy level in a
1
n-π* excited state of the fluorescent compound is greater than an energy level in the
1
π-π* excited state of the fluorescent compound, the fluorescent compound emits a fluorescent light by radiative energy transition of an exciton in the
1
π-π* excited state to a ground state, and the energy level in the
1
n-π* excited state, the energy level in the
1
π-π* excited state, and the energy level in the
3
n-π* excited state are each independently calculated by using a time dependent-Density Functional Theory method.