Structure–activity relationships of the peptide deformylase inhibitor BB-3497: modification of the methylene spacer and the P1′ side chain
摘要:
Structural modifications to the peptide deformylase inhibitor BB-3497 are described. In this paper, we describe the initial SAR around this lead for modifications to the methylene spacer and the P1' side chain. Enzyme inhibition and antibacterial activity data revealed that the optimum distance between the N-formyl hydroxylamine metal binding group and the P1' side chain is one unsubstituted methylene unit. Additionally, lipophilic P1' side chains that closely mimic the methionine residue in the substrate provided compounds with the best microbiological profile. (C) 2003 Elsevier Ltd. All rights reserved.
Diastereoselective and diastereoconvergent syntheses of 2- and 3-substituted morpholine congeners are reported. Starting from tosyl-oxazatedine 1 and α-formyl carboxylates 2, base catalysis is utilized to yield morpholine hemiaminals. Their further synthetic elaborations allowed the concise constructions of conformationally rigid morpholines. The observed diastereoselectivities and the unusual diastereoconvergence
An enantioselective synthesis of β2-amino acid derivatives
作者:Jomana Elaridi、Ali Thaqi、Andrew Prosser、W. Roy Jackson、Andrea J. Robinson
DOI:10.1016/j.tetasy.2005.01.048
日期:2005.4
Enantioselective hydrogenation of a series of (E)-alpha-substituted beta-amidoacrylates using Rh(I)-catalysts with chiral phosphine ligands (BPE, DuPHOS) gives beta(2)-amino acid derivatives with enantioselectivities of up to 67%. A beta(2,3)-amino acid derivative was also synthesised with similar enantioselectivity (<= 65%) from the corresponding prochiral enamide. (c) 2005 Elsevier Ltd. All rights reserved.