Synthesis of nisin AB dicarba analogs using ring-closing metathesis: influence of sp<sup>3</sup>versus sp<sup>2</sup>hybridization of the α-carbon atom of residues dehydrobutyrine-2 and dehydroalanine-5 on the lipid II binding affinity
作者:Jack C. Slootweg、Eric. F. van Herwerden、Mark. F. M. van Doremalen、Eefjan Breukink、Rob M. J. Liskamp、Dirk T. S. Rijkers
DOI:10.1039/c5ob00336a
日期:——
alanine at position 2 and 5, respectively. The native dehydrobutyrine at position 2 and dehydroalanine at position 5 were introduced as their precursors, namely threonine and serine, respectively, and subsequent dehydration was carried out by EDCI/CuCl as the condensing agent. Both AB-fragment mimics were analyzed in a lipid II binding assay and it was found that the Ala2/Ala5 AB-mimic (2) showed a reduced
The present application relates to dipeptide-like prodrug derivatives of 2-amino-6-([2-(4-chlorophenyl)-1,3-oxazol-4-yl]methyl}sulfanyl)-4-(4-[2,3-dihydroxypropyl]oxy}phenyl)pyridine-3,5-dicarbonitrile, processes for their preparation, their use for the treatment and/or prophylaxis of diseases, and their use for the manufacture of medicaments for the treatment and/or prophylaxis of diseases, especially of cardiovascular disorders.
We describe herein the syntheses and evaluation of a series of C-termini pyridyl containing Phe*-Ala-based BACE inhibitors (5-19). In conjunction with four fixed residues at the P1 (Phe), P1' (Ala), P2' (Val), and P2' cap (Pyr.), rather detailed SAR modifications at P2 and P3 positions were pursued. The promising inhibitors emerging from this SAR investigation, 12 and 17 demonstrated very good enzyme potency (IC50 = 45 nM) and cellular activity (IC50 = 0.4 muM). (C) 2003 Elsevier Ltd. All rights reserved.