[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF MEROPENEM<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION DE MÉROPÉNEM
申请人:ORCHID CHEMICALS & PHARM LTD
公开号:WO2011141847A1
公开(公告)日:2011-11-17
The present invention provides an improved process for the preparation of methyl carbapenem derivative of formula (I) or its pharmaceutically acceptable salts or hydrates thereof in a pure form.
Non-Heme Iron Oxygenases Generate Natural Structural Diversity in Carbapenem Antibiotics
作者:Micah J. Bodner、Ryan M. Phelan、Michael F. Freeman、Rongfeng Li、Craig A. Townsend
DOI:10.1021/ja907320n
日期:2010.1.13
Carbapenems are a clinically important antibiotic family. More than 50 naturally occurring carbapenam/ems are known and are distinguished primarily by their C-2/C-6 side chains where many are only differentiated by the oxidation states of these substituents. With a limited palette of variations the carbapenem family comprises a natural combinatorial library, and C-2/C-6 oxidation is associated with
The benzylester (3) and p-nitrobenzylester (PNB ester)(4) of the antibiotic PS-5 and the bis-protected PS-6 (5) were stereoselectively synthesised by application of the new carbon–carbon bond formation reaction at the C-4-position of 4-acetoxy-3-ethyl- or 4-acetoxy-3-ethyl- or 4-acetoxy-3-isopropyl-azetidin-2-ones [(10) or (11)].
(7), which has been stereoselectively synthesised via the 4-methoxycarbonylisoxazoline (4), was converted into (±)-epithienamycins A (2) and B (3)[(±)-olivanicacidsMM22380 and MM22382], (±)-deacetylepithienamycin A (20), and the 2-phenylthio-substituted compound (19). This totalsynthesis confirms the relative stereochemistry of the natural antibiotics.
已立体选择合成的(±)-(3 R *,4 R *)-4-(2,2-二甲氧基乙基)-3 [(1 S *)-1-羟乙基]氮杂环丁烷-2-酮(7)通过4-甲氧基羰基异恶唑啉(4)转化为(±)-上皮霉素A(2)和B(3)[(±)-寡酸MM22380和MM22382],(±)-脱乙酰基表艾霉素A(20)和2-苯硫基取代的化合物(19)。该总合成证实了天然抗生素的相对立体化学。
Studies on novel carbacephem analogs: synthesis of 7-methoxy-homo-PS-5 and a 7-methoxy-8-epi-homothienamycin intermediate
作者:S. R. Shakya、T. Durst
DOI:10.1139/v92-269
日期:1992.8.1
The synthesis of two carbacephems bearing a 7-methoxy group and either an additional ethyl (PS-5) or hydroxyethyl (thienamycin) side chain has been completed. Rhodium carbenoid insertion methodology was used to generate the bicyclic ring systems.