Enzymatic synthesis of optically active 1- and 2-aminoalkanephosphonates
摘要:
A number of 1- and 2-aminoalkanephosphonates were resolved with high enantioselectivity by Candida antarctica lipase B-catalyzed acetylation. By this method, optically pure aminoalkanephosphonates and amidoalkanephosphonates, the precursors of the corresponding aminoalkanephosphonic acids, were synthesized. (C) 2003 Elsevier Ltd. All rights reserved.
Optically active diethyl N-(p-toluenesulfonyl)-aziridine 2-phosphonates as chiral synthons for the synthesis of β-substituted α-amino phosphonates
作者:E. Kurt Dolence、Jason B. Roylance
DOI:10.1016/j.tetasy.2004.08.034
日期:2004.10
versatile approach for the synthesis of both protected enantiomers of aziridine 2-phosphonates for use as chiralsynthons has been developed. The aziridines arise from either (R)- or (S)-phosphonoserine diethyl esters followed by N-tosylation, O-mesylation and cyclization with sodium hydride. These highly enantio-enriched aziridine 2-phosphonates have been shown to react with carbon, nitrogen, sulfur
Synthesis and structure-activity relationships of antibacterial phosphonopeptides incorporating (1-aminoethyl)phosphonic acid and (aminomethyl)phosphonic acid
作者:Frank R. Atherton、Cedric H. Hassall、Robert W. Lambert
DOI:10.1021/jm00151a005
日期:1986.1
Phosphonodipeptides and phosphonooligopeptides based on L- and D-(1-aminoethyl)phosphonic acids L-Ala(P) and D-Ala(P) and (aminomethyl)phosphonic acid Gly(P) at the acid terminus have been synthesized and investigated as antibacterial agents, which owe their activity to the inhibition of bacterial cell-wall biosynthesis. A method for large-scale synthesis of the potent antibacterial agent L-Ala-L-Ala(P) (1, Alafosfalin) is described. Structure-activity relationships in the dipeptide series have been studied by systematic variation of structure 1. L stereochemistry is generally required for both components. Changes in the L-Ala(P) moiety mostly lead to loss of antibacterial activity, but the phosphonate analogues of L-phenylalanine, L-Phe(P), and L-serine, L-Ser(P), give rise to weakly active L-Ala-L-Phe(P) and L-Ala-L-Ser(P). Replacement of L-Ala in 1 by common and rare amino acids can give rise to more potent in vitro antibacterials such as L-Nva-L-Ala(P) (45). Synthetic variation of these more potent dipeptides leads to decreased activity. Phosphonooligopeptides such as (L-Ala)2-L-Ala(P) have a broader in vitro antibacterial spectrum than their phosphonodipeptide precursor, but this is not expressed in vivo, presumably due to rapid metabolism to 1. Stabilized compounds such as Sar-L-Nva-L-Nva-L-Ala(P) (46) have been developed that are more potent in vivo and have a broader in vivo antibacterial spectrum than the parent phosphonodipeptide.
[EN] THERAPEUTICALLY USEFUL ANTIBACTERIAL COMPOUNDS<br/>[FR] COMPOSES ANTIBACTERIENS A USAGE THERAPEUTIQUE
申请人:OXOID LTD
公开号:WO2005067939A1
公开(公告)日:2005-07-28
Disclosed is a compound which has antibiotic activity in vivo in a mammalian, preferably a human, subject, the compound comprising an uptake moiety linked to a bactericidal or bacteriostatic toxic moiety, said uptake moiety facilitating uptake of the compound by bacteria on which the toxic moiety exerts a bactericidal or bacteriostatic effect, wherein: (a) the compound is non-toxic for mammalian subjects; (b) the linkage between the uptake moiety and the toxic moiety is one which is cleavable by an enzyme or enzymes produced by the bacteria to be killed/inhibited, but is not readily cleavable by enzymes produced by the subject and to which the compound is exposed prior to contacting the bacteria; and (c) the toxic moiety, when cleaved from the uptake moiety, is toxic for the bacteria, but not toxic for the subject.
Enzymatic synthesis of optically active 1- and 2-aminoalkanephosphonates
作者:Chengye Yuan、Chengfu Xu、Yonghui Zhang
DOI:10.1016/s0040-4020(03)00995-5
日期:2003.8
A number of 1- and 2-aminoalkanephosphonates were resolved with high enantioselectivity by Candida antarctica lipase B-catalyzed acetylation. By this method, optically pure aminoalkanephosphonates and amidoalkanephosphonates, the precursors of the corresponding aminoalkanephosphonic acids, were synthesized. (C) 2003 Elsevier Ltd. All rights reserved.