Synthesis of symmetrical C- and pseudo-symmetrical O-linked disaccharide analogs for arabinosyltransferase inhibitory activity in Mycobacterium tuberculosis
摘要:
Herein we report the Synthesis of symmetrical C-linked and pseudo-symmetrical O-linked disaccharides structurally related to Araf motifs present in the cell wall of MTB. Their activity in a competition-based arabinosyltransferase assay using [C-14]-DPA as the glycosyl donor is also presented. In addition, in vitro inhibitory activity for the disaccharides was determined in a colorimetric broth microdilution assay system against MTB H37Ra and Mycobacterium avium. (c) 2007 Elsevier Ltd. All rights reserved.
Ethambutol–sugar hybrids as potential inhibitors of mycobacterial cell-wall biosynthesis
摘要:
Ethambutol is an established front-line agent for the treatment of tuberculosis, and is also active against Mycobacterium avium infection. However, this agent exhibits toxicity, and is considered to have low potency. The action of ethambutol on the mycobacterial cell wall, particularly the arabinan, and comparison of the structure of ethambutol with several of the cell-wall saccharides, suggested that ethambutol-saccharide hybrids might lead to agents with a more selective mechanism of action. To this end, eight ethambutol-saccharide hybrids were synthesized and screened against M. tuberculosis and several clinical isolates of M. avium. (C) 1999 Elsevier Science Ltd. All rights reserved.
Ethambutol–sugar hybrids as potential inhibitors of mycobacterial cell-wall biosynthesis
作者:Robert C Reynolds、Namita Bansal、Jerry Rose、Joyce Friedrich、William J Suling、Joseph A Maddry
DOI:10.1016/s0008-6215(99)00069-5
日期:1999.4
Ethambutol is an established front-line agent for the treatment of tuberculosis, and is also active against Mycobacterium avium infection. However, this agent exhibits toxicity, and is considered to have low potency. The action of ethambutol on the mycobacterial cell wall, particularly the arabinan, and comparison of the structure of ethambutol with several of the cell-wall saccharides, suggested that ethambutol-saccharide hybrids might lead to agents with a more selective mechanism of action. To this end, eight ethambutol-saccharide hybrids were synthesized and screened against M. tuberculosis and several clinical isolates of M. avium. (C) 1999 Elsevier Science Ltd. All rights reserved.
Synthesis and Application of Carbohydrate-Derived Morpholine Amino Acids
作者:Gijsbert M. Grotenbreg、Alphert E. Christina、Annelies E. M. Buizert、Gijsbert A. van der Marel、Herman S. Overkleeft、Mark Overhand
DOI:10.1021/jo048630x
日期:2004.11.1
The synthesis of series of diversely functionalized epsilon-morpholine amino acids (MAAs, 5a-h) starting from an E-sugar amino acid and following a two-step oxidative glycol cleavage/reductive amination strategy, is described. In an alternative synthetic scheme, diastereoisomerically pure delta-MAAs (12a,b) were obtained. Oligopeptides containing MAAs were prepared either by direct incorporation of a MAA building block or by subjecting a fully assembled SAA-containing peptide to the two-step glycol cleavage/reductive amination procedure.
Synthesis of symmetrical C- and pseudo-symmetrical O-linked disaccharide analogs for arabinosyltransferase inhibitory activity in Mycobacterium tuberculosis
作者:Ashish K. Pathak、Vibha Pathak、James R. Riordan、William J. Suling、Sudagar S. Gurcha、Gurdyal S. Besra、Robert C. Reynolds
DOI:10.1016/j.bmcl.2007.05.099
日期:2007.8
Herein we report the Synthesis of symmetrical C-linked and pseudo-symmetrical O-linked disaccharides structurally related to Araf motifs present in the cell wall of MTB. Their activity in a competition-based arabinosyltransferase assay using [C-14]-DPA as the glycosyl donor is also presented. In addition, in vitro inhibitory activity for the disaccharides was determined in a colorimetric broth microdilution assay system against MTB H37Ra and Mycobacterium avium. (c) 2007 Elsevier Ltd. All rights reserved.