223438-52-6Relevant academic research and scientific papers
Structure-based design of a new series of d-glutamic acid based inhibitors of bacterial UDP-N-acetylmuramoyl-l-alanine: D-glutamate ligase (MurD)
Toma?i?, Tihomir,Zidar, Nace,?ink, Roman,Kova?, Andreja,Blanot, Didier,Contreras-Martel, Carlos,Dessen, Andréa,Müller-Premru, Manica,Zega, Anamarija,Gobec, Stanislav,Kikelj, Danijel,Peterlin Ma?i?, Lucija
supporting information; experimental part, p. 4600 - 4610 (2011/09/14)
MurD ligase is one of the key enzymes participating in the intracellular steps of peptidoglycan biosynthesis and constitutes a viable target in the search for novel antibacterial drugs to combat bacterial drug-resistance. We have designed, synthesized, and evaluated a new series of d-glutamic acid-based Escherichia coli MurD inhibitors incorporating the 5-benzylidenethiazolidin-4- one scaffold. The crystal structure of 16 in the MurD active site has provided a good starting point for the design of structurally optimized inhibitors 73-75 endowed with improved MurD inhibitory potency (IC50 between 3 and 7 μM). Inhibitors 74 and 75 showed weak activity against Gram-positive Staphylococcus aureus and Enterococcus faecalis. Compounds 73-75, with IC 50 values in the low micromolar range, represent the most potent d-Glu-based MurD inhibitors reported to date.
An efficient and scalable synthesis of the endothelin antagonists UK-350,926 and UK-349,862 using a dynamic resolution process
Ashcroft, Christopher P.,Challenger, Stephen,Clifford, David,Derrick, Andrew M.,Hajikarimian, Yousef,Slucock, Keith,Silk, Terry V.,Thomson, Nicholas M.,Williams, John R.
, p. 663 - 669 (2012/12/25)
The development and scale-up of a potential manufacturing route to the endothelin antagonists UK-350,926 1 and UK-349,862 2 are described. A key synthetic challenge in designing an efficient route to these molecules was the optical lability of the stereogenic centre during the construction of the acylsulfonamide functionality. In the discovery synthesis of UK-350,926 the chiral centre was introduced by classical resolution and the acylsulfonamide functionality synthesized by construction of the N-sulfonyl bond. An alternative more efficient process route was developed involving the preparation of racemic UK-350,926 and final step dynamic resolution with (S)-(-)-1-phenylethylamine as the key step. The process route prepared the acylsulfonamide by construction of the N-carbonyl bond, eliminates a cryogenic reaction and a hazardous intermediate from the synthesis, improves the overall process yield, and allows access to both endothelin antagonists from common intermediates without the need for purification by chromatography. Full experimental details of the new five-step process to prepare UK-349,862 from commercially available starting materials are given for the first time.
The design and synthesis of a novel, orally active, selective ETA antagonist
Rawson, David J.,Dack, Kevin N.,Dickinson, Roger P.,James, Kim,Long, Clive,Walker, Don
, p. 149 - 157 (2007/10/03)
The potency and pharmacokinetic properties of an indole-based series of endothelin antagonists have been optimised using in vitro, in silico and in vivo methods. Compound 8 is oxidised in vivo to the active metabolite 7 and has been highlighted as an oral
