Bicyclic and Tricyclic Substituted 6-Methylidene Carbapenems as Broad Spectrum Beta-Lactamase Inhibitors
申请人:Mansour Tarek Suhayl
公开号:US20100063023A1
公开(公告)日:2010-03-11
Provided is a β-lactamase antibiotic and a compound of formula I, a process of producing the compound, pharmaceutical compositions and the use thereof for the treatment of bacterial infection or disease in a patient in need thereof.
Synthesis of 6-(substituted methylene) carbapenem derivatives from 6-aminopenicillanic acid
作者:Steven Coulton、Irene François
DOI:10.1039/p19910002699
日期:——
The key intermediate in the preparation of novel 6-(substituted methylene) carbapenem derivatives is p-methoxybenzyl (5R,6R)-6-bromo-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate 26, which was prepared in several steps from 6-aminopenicillanic acid 14 via (3R,4R)-4-allyl-3-bromoazetidin-2-one 21. Sequential treatment of the aforementioned ester 26 with either lithium diisopropylamide or lithium diphenylamide, 1-methyl-1H-1,2,3-triazole-4-carbaldehyde and acetic anhydride provided a diastereoisomeric mixture of acylated bromohydrins 28; reductive elimination then afforded the isomeric (E)- and (Z)-6-triazolylmethylene carbapenem esters 29 and 31, respectively. Lewis acid-mediated deprotection of the 6-bromo and 6-[(E)-triazolylmethylene] esters 26 and 29 gave the sodium salts of (5R,6R)-6-bromo-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 27 and (5R)-6-[(E)-(1-methyl-1H-1,2,3-triazol-4-yl)methylene]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 30, respectively.In addition, condensation of the anion, generated by deprotonation of the 6-bromo ester, with acetaldehyde, followed by acylation and reductive elimination furnished the isomeric (E)- and (Z)-ethylidene carbapenem esters.Whilst the (E)-6-triazolylmethylene carbapenem displayed low levels of antibacterial activity, it possessed no beta-lactamase-inhibitory activity whatsoever. The 6-bromocarbapenem was devoid of both antibacterial and beta-lactamase-inhibitory activity.
Nuclear analogs of β-lactam antibiotics. XVII. Stereospecific synthesis of penem and carbapenem precursors
COULTON, STEVEN;FRANCOIS, IRENE, TETRAHEDRON LETT., 30,(1989) N3, C. 3117-3120
作者:COULTON, STEVEN、FRANCOIS, IRENE
DOI:——
日期:——
Synthesis of (5) ()-6-[(1-methyl-1,2,3-triazol-4-yl)methylene]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, a novel carbapenem derivative, from 6-aminopenicillanic acid
作者:Steven Coulton、Irene François
DOI:10.1016/s0040-4039(00)99417-6
日期:1989.1
The title compound has been prepared from 6-aminopenicillanicacid the novel intermediate, -methoxybenzyl (5,6) 6-bromo-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (10).