Reaction intermediate analogues as bisubstrate inhibitors of pantothenate synthetase
摘要:
The biosynthesis of pantothenate, the core of coenzyme A (CoA), has been considered an attractive target for the development of antimicrobial agents since this pathway is essential in prokaryotes, but absent in mammals. Pantothenate synthetase, encoded by the gene panC, catalyzes the final condensation of pantoic acid with beta-alanine to afford pantothenate via an intermediate pantoyl adenylate. We describe the synthesis and biochemical characterization of five PanC inhibitors that mimic the intermediate pantoyl adenylate. These inhibitors are competitive inhibitors with respect to pantoic acid and possess submicromolar to micromolar inhibition constants. The observed SAR is rationalized through molecular docking studies based on the reported co-crystal structure of 1a with PanC. Finally, whole cell activity is assessed against wild-type Mtb as well as a PanC knockdown strain where PanC is depleted to less than 5% of wild-type levels. (C) 2014 Elsevier Ltd. All rights reserved.
Compounds of the invention are useful in inhibiting thrombin and associated thrombotic occlusions having the following structure:
1
or a pharmaceutically acceptable salt thereof, e.g. where R
3
is —CH
2
NH
2
, —CH
2
CH
2
NH
2
, or —CH
2
NHC(O)OC(CH
3
)
3
.
Direct asymmetric hydrogenation of α-keto acids by using the highly efficient chiral spiro iridium catalysts
作者:Pu-Cha Yan、Jian-Hua Xie、Xiang-Dong Zhang、Kang Chen、Yuan-Qiang Li、Qi-Lin Zhou、Da-Qing Che
DOI:10.1039/c4cc07643e
日期:——
A new efficient and highly enantioselective direct asymmetrichydrogenation of alpha-keto acids employing the Ir/SpiroPAP catalyst under mild reaction conditions has been developed. This method might be feasible for the preparation of a series of chiral alpha-hydroxy acids on a large scale.
[EN] IMIDAZOPYRIDINE DERIVATIVES AS JAK INHIBITORS<br/>[FR] DÉRIVÉS DE L'IMIDAZOPYRIDINE EN TANT QU'INHIBITEURS DE JAK
申请人:ALMIRALL SA
公开号:WO2011076419A1
公开(公告)日:2011-06-30
New imidazopyridine derivatives having the chemical structure of formula (I) are disclosed; as well as process for their preparation, pharmaceutical compositions comprising them and their use in therapy as inhibitors of Janus Kinases (JAK).
Polyfunctional ()-2-hydroxycarboxylic acids by reduction of 2-oxo acids with hydrogen gas or formate and resting cells of proteus vulgaris
作者:Anita Schummer、Hongtao Yu、Helmut Simon
DOI:10.1016/s0040-4020(01)86506-6
日期:1991.11
Various ()-2-hydroxy acids such as ()-2-hydroxy-3-enoic-, 3,5-dienoic-, 4-oxo-, ()-3-hydroxy and some others were prepared on a scale up to 0.12 mol by biocatalytic reduction of the corresponding 2-oxo acids with P. vulgaris and hydrogen gas and/or formate as electron donors. With the exception of the 2-hydroxy-4-oxo acids it could be proved that the enantiomeric excess is > 97%. For the 4-oxo derivatives