Conformational restriction of methionyl tRNA synthetase inhibitors leading to analogues with potent inhibition and excellent gram-Positive antibacterial activity
作者:Richard L. Jarvest、John M. Berge、Pamela Brown、Catherine S.V. Houge-Frydrych、Peter J. O'Hanlon、David J. McNair、Andrew J. Pope、Stephen Rittenhouse
DOI:10.1016/s0960-894x(03)00093-3
日期:2003.4
Conformationally restricted analogues of the central linker unit of bacterial methionyl tRNA synthetase (MRS) inhibitors have been prepared. The (IS,2R)-cyclopentylmethyl moiety was identified as the preferred cyclic linker, with significant diastereo- and enantio selectivity of activity. Combination of this linker with an optimal substituted aryl right-hand side has resulted in a compound with exceptionally good antibacterial activity against staphylococci and enterococci, including antibiotic resistant strains. (C) 2003 Elsevier Science Ltd. All rights reserved.
Asymmetric synthesis of (–)-(1R,2S)-cispentacin and related cis- and trans-2-amino cyclopentane- and cyclohexane-1-carboxylic acids
作者:Stephen G. Davies、Osamu Ichihara、Isabelle Lenoir、Iain A. S. Walters
DOI:10.1039/p19940001411
日期:——
The antifungal antibiotic (–)-(1R,2S)-2-aminocyclopentane-1-carboxylic acid (cispentacin)8 and its cyclohexane homologue 14 have been prepared utilizing the highly stereoselective conjugate addition of homochiral lithium N-benzyl-N-α-methylbenzylamide 5. The corresponding trans-β-amino acids 10 and 16 were also prepared via the selective epimerization of the cis-β-amino ester conjugate addition products