shows extraordinary high activity in the decarboxylative coupling of cinnamic acids with alcohols. In addition, the Cu-X catalyst presents excellent performance in the oxidativecoupling of alkenes with aldehydes. The strong interaction between Cu+ and the zeolite framework benefits the transformation of Cu2+ and Cu+ in the redox process, enhancing the reaction activity. More importantly, the Lewis basic
Identification of substituted 3-hydroxy-2-mercaptocyclohex-2-enones as potent inhibitors of human lactate dehydrogenase
作者:Peter S. Dragovich、Benjamin P. Fauber、Jason Boggs、Jinhua Chen、Laura B. Corson、Charles Z. Ding、Charles Eigenbrot、HongXiu Ge、Anthony M. Giannetti、Thomas Hunsaker、Sharada Labadie、Chiho Li、Yichin Liu、Yingchun Liu、Shuguang Ma、Shiva Malek、David Peterson、Keith E. Pitts、Hans E. Purkey、Kirk Robarge、Laurent Salphati、Steve Sideris、Mark Ultsch、Erica VanderPorten、Jing Wang、BinQing Wei、Qing Xu、Ivana Yen、Qin Yue、Huihui Zhang、Xuying Zhang、Aihe Zhou
DOI:10.1016/j.bmcl.2014.06.076
日期:2014.8
A novel class of 3-hydroxy-2-mercaptocyclohex-2-enone-containing inhibitors of human lactate dehydrogenase (LDH) was identified through a high-throughput screening approach. Biochemical and surface plasmon resonance experiments performed with a screening hit (LDHA IC50 = 1.7 mu M) indicated that the compound specifically associated with human LDHA in a manner that required simultaneous binding of the NADH co-factor. Structural variation of this screening hit resulted in significant improvements in LDHA biochemical inhibition activity (best IC50 = 0.18 mu M). Two crystal structures of optimized compounds bound to human LDHA were obtained and explained many of the observed structure-activity relationships. In addition, an optimized inhibitor exhibited good pharmacokinetic properties after oral administration to rats (F = 45%). (C) 2014 Elsevier Ltd. All rights reserved.
Switchable asymmetric bio-epoxidation of α,β-unsaturated ketones
作者:Yu-Chang Liu、Zhong-Liu Wu
DOI:10.1039/c5cc07548c
日期:——
Efficient asymmetric bio-epoxidation of electron-deficient [small alpha],[small beta]-unsaturated ketones was realized via a tandem reduction-epoxidation-dehydrogenation cascade, which proceeds in a switchable manner to afford either chiral epoxy ketones or allylic epoxy alcohols...
styrene monooxygenase that catalyzes the formation of the chiral epoxy group, and two alcohol dehydrogenases that fulfil the epimerisation of the hydroxy group. Two sets of alcohol dehydrogenases were each applied to couple with styrene monooxygenase in order to realize the epimerisation in a stereo-complementary manner. Excellent enantio- and diastereo-selectivities were achieved for most of the 12 substrates