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    • 31. 发明申请
    • IMPROVED PROCESSES FOR THE PREPARATION OF LINEZOLID CRYSTALLINE FORM III
    • 线性晶体结构形式的改进方法III
    • WO2013190559A1
    • 2013-12-27
    • PCT/IN2012/000434
    • 2012-06-19
    • SYMED LABS LIMITEDMOHAN RAO, Dodda
    • MOHAN RAO, Dodda
    • A61K31/5377
    • A61K31/5377
    • We have surprisingly and unexpectedly found that linezolid crystalline Form III can be prepared in an improved, efficient and cost effective process, in high purity and with high yield, by reacting the solution of (S)-N-[[3-[3-fluoro-4-[4-morpholinyl] phenyl]-2-oxo-5-oxazolidinyl]methyl]amine in methylene chloride with acetic anhydride, optionally in the presence of an organic base, to produce a reaction mass containing linezolid, followed by layer separation and subsequent carbon treatment to the resulting organic layer to form a filtrate, adding water to the resulting filtrate, and subsequent removal of methylene chloride solvent by distillation, optionally seeding the reaction mass during the distillation process, to produce the crystalline Form III of linezolid.
    • 我们出人意料地意外地发现,利用(S)-N - [[3- [3-(3-甲氧基 - 苯基) - 哌啶-1-基]苯甲酸的溶液,可以以高纯度和高产率,以改进的,有效和成本有效的方法制备利奈唑胺晶形III 氟代-4- [4-吗啉基]苯基] -2-氧代-5-恶唑烷基]甲基]胺的二氯甲烷与乙酸酐,任选在有机碱存在下反应,生成含有利奈唑胺的反应物质, 分离和随后的碳处理到所得有机层以形成滤液,向所得滤液中加入水,随后通过蒸馏除去二氯甲烷溶剂,任选地在蒸馏过程中接种反应物料,以产生利奈唑胺的晶型III 。
    • 38. 发明申请
    • A NOVEL PROCESS FOR THE PREPARATION OF LINEZOLID AND RELATED COMPOUNDS
    • 制备线性和相关化合物的新方法
    • WO2005099353A2
    • 2005-10-27
    • PCT/IN2004000105
    • 2004-04-19
    • SYMED LABS LTDMOHAN RAO DODDAKRISHNA REDDY PINGILI
    • MOHAN RAO DODDAKRISHNA REDDY PINGILI
    • C07D295/135C07D413/10C07D417/10
    • C07D413/10C07D263/20C07D295/135C07D417/10
    • The present invention provides a novel process for preparation of 5-aminomethyl substituted oxazolidinones, key intermediates for oxazolidinone antibacterials including linezolid. Thus linezolid is prepared by a) reacting 3-fluoro-4-morpholinyl aniline with R-epichlorohydrin; b) subjecting N-[3-Chloro-2-(R)-hydroxypropyl]-3-fluoro-4-morpholinyl aniline produced above to carbonylation; c) reacting (5R)-5-(chloromethyl)-3-[3-fluoro-4-(4-morpholinyl)phenyl]-2-oxazolidinone produced above with potassium phthalimide; d) reacting (S)-N-[[3-[3-Fluoro-4-[4-morpholinyl]phenyl]-2-oxo-5-oxazolidinyl]methyl]phthalimide produced above with hydrazine hydrate; and e) reacting S-N-[[3-[3-Fluoro-4-[4-morpholinyl]phenyl]-2-oxo-5-oxazolidinyl]methyl]amine produced above with acetic anhydride to produce linezolid.
    • 本发明提供了一种制备5-氨基甲基取代的恶唑烷酮的新方法,包括利奈唑胺的恶唑烷酮抗菌剂的关键中间体。 因此,利奈唑胺通过以下方法制备:a)使3-氟-4-吗啉基苯胺与R-表氯醇反应; b)使上面制备的N- [3-氯-2-(R) - 羟丙基] -3-氟-4-吗啉基苯胺进行羰基化; c)使上述制备的(5R)-5-(氯甲基)-3- [3-氟-4-(4-吗啉基)苯基] -2-恶唑烷酮与邻苯二甲酰亚胺钾反应; d)使上述制备的(S)-N - [[3- [3-氟-4- [4-吗啉基]苯基] -2-氧代-5-恶唑烷基]甲基]邻苯二甲酰亚胺与水合肼反应; 和e)使上述制备的S-N - [[3- [3-氟-4- [4-吗啉基]苯基] -2-氧代-5-恶唑烷基]甲基]胺与乙酸酐反应,生成利奈唑胺。