Design, Synthesis, and Pharmacological Evaluation of Second Generation EZH2 Inhibitors with Long Residence Time
摘要:
Histone methyltransferase EZH2, which is the catalytic subunit of the PRC2 complex, catalyzes the methylation of histone H3K27-a transcriptionally repressive post-translational modification (PTM). EZH2 is commonly mutated in hematologic malignancies and frequently overexpressed in solid tumors, where its expression level often correlates with poor prognosis. First generation EZH2 inhibitors are beginning to show clinical benefit, and we believe that a second generation EZH2 inhibitor could further build upon this foundation to fully realize the therapeutic potential of EZH2 inhibition. During our medicinal chemistry campaign, we identified 4-thiomethyl pyridone as a key modification that led to significantly increased potency and prolonged residence time. Leveraging this finding, we optimized a series of EZH2 inhibitors, with enhanced antitumor activity and improved physiochemical properties, which have the potential to expand the clinical use of EZH2 inhibition.
In this study, we developed a one-pot one-step deracemization method for the production of various enantiomerically pure amines using two opposite enantioselective Ï-TAs. Using this method, various aromatic amines were successfully converted to their (R)-forms (>99%) with good conversion.
Efficient synthesis of chiral phenethylamines: preparation, asymmetric hydrogenation, and mild deprotection of ene-trifluoroacetamides
作者:Shawn P. Allwein、J. Christopher McWilliams、Elizabeth A. Secord、Dale R. Mowrey、Todd D. Nelson、Michael H. Kress
DOI:10.1016/j.tetlet.2006.06.135
日期:2006.9
efficient route to enantioenriched aryl alkyl amines from ketones has been developed. The first successful synthesis and asymmetric hydrogenation of ene-trifluoroamides from oximes gave highly enantioenriched trifluoroacetamides (94–98% ee). The corresponding phenethyl amides are liberated under mild conditions (K2CO3, MeOH/H2O). In addition, a new application of Josiphos ligands toward the asymmetric hydrogenation
从酮类到对映体富集的芳基烷基胺的温和有效途径已得到开发。首次成功地从肟中合成烯和三氟酰胺并进行不对称加氢,得到了高度对映体富集的三氟乙酰胺(94-98%ee)。在温和的条件下(K 2 CO 3,MeOH / H 2 O)释放出相应的苯乙基酰胺。另外,发现了Josiphos配体在烯乙酰胺和烯三氟乙酰胺的不对称氢化中的新应用。
Identification of novel thermostable ω-transaminase and its application for enzymatic synthesis of chiral amines at high temperature
作者:Sam Mathew、Kanagavel Deepankumar、Giyoung Shin、Eun Young Hong、Byung-Gee Kim、Taeowan Chung、Hyungdon Yun
DOI:10.1039/c6ra15110h
日期:——
A novel thermostable ω-transaminase from Thermomicrobium roseum which showed broad substrate specificity and high enantioselectivity was identified, expressed and biochemically characterized. The advantage of this enzyme to remove volatile inhibitory by-products was demonstrated by performing asymmetric synthesis and kinetic resolution at high temperature.
[EN] CEPHALOSPORIN DERIVATIVES USEFUL AS ß-LACTAMASE INHIBITORS AND COMPOSITIONS AND METHODS OF USE THEREOF<br/>[FR] DÉRIVÉS DE LA CÉPHALOSPORINE UTILES COMME INHIBITEURS DE LA ?-LACTAMASE ET LEURS COMPOSITIONS ET PROCÉDÉS D'UTILISATION
申请人:DMITRIENKO GARY IGOR
公开号:WO2011103686A1
公开(公告)日:2011-09-01
The present invention relates to cephalosporin derivatives having β- lactamase inhibitory activity. The compounds are useful in preventing or treating bacterial resistance to an antibiotic, e.g. a β-lactam antibiotic. Disclosed herein are compounds that are inhibitors of class B metallo-β-lactamases, as well as class A, C, and D serine β-lactamases. In some preferred embodiments, the compounds are 3'- thiobenzoate derivatives of a cephalosporin. Pharmaceutical compositions, methods, uses, kits and commercial packages comprising the compounds are also disclosed.