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    • 9. 发明申请
    • A NOVEL PROCESS FOR THE PREPARATION OF ESZOPICLONE
    • 一种制备ESZOPICLONE的新工艺
    • WO2009101634A3
    • 2014-10-16
    • PCT/IN2009000097
    • 2009-02-11
    • LUPIN LTDTHAPER RAJESH KUMARPRABHAVAT MANO J DEVILALJIRALHAN SUMANSINGARE DNYANESHWAR TUKARAMBHOSALE SMITE SHIVAJIBHATNAGAR AKSHAT KUMAR
    • THAPER RAJESH KUMARPRABHAVAT MANO J DEVILALJIRALHAN SUMANSINGARE DNYANESHWAR TUKARAMBHOSALE SMITE SHIVAJIBHATNAGAR AKSHAT KUMAR
    • C07D487/04
    • C07D487/04
    • The present invention is related to a novel process for the preparation of eszopiclone (II), that comprises the following steps: (a) preparation of zopiclone (I) by reaction of 6-(5-chloropyridin-2-yl)-5-hydroxy-7-oxo- 5,6-dihydropyrrolo[3,4-b]pyrazine-5-one (5-OH-Py) (III) with chloro-carbonyl-4- methyl-piperazine (CMP) free base (IV) or its acid addition salt in the presence of diazabicylo [5.4.0]undec-7-ene (DBU) or a mixture of DBU and other bases; (b) resolution of racemic zopiclone with dibenzoyl-D-tartaric acid in suitable solvent wherein dibenzoyl-D-tartaric acid addition salt of eszopiclone is separated by the addition of a nitrile solvent; (c) optional purification of dibenzoyl-D-tartaric acid addition salt of eszopiclone by dissolution in solvent selected from alcohols, ketones or mixture thereof followed by the precipitation by adding a nitrile solvent; (d) conversion of the dibenzoyl-D-tartaric acid addition salt of eszopiclone to obtain the eszopiclone free base (II) by treating with an alkaline solution; (e) purification of eszopiclone by dissolving in nitrile solvent followed by addition of ketonic solvent. The eszopiclone (II) obtained by the process of the present invention has chiral purity greater than 99.9% and less amounts of organic volatile impurities. The present invention further provides novel crystalline form B of eszopiclone- Dibenzoyl-D-tartarate salt (V) and its preparation.
    • 本发明涉及一种制备右佐佐酮(II)的新方法,其包括以下步骤:(a)通过6-(5-氯吡啶-2-基)-5- 羟基-7-氧代-5,6-二氢吡咯并[3,4-b]吡嗪-5-酮(5-OH-Py)(III)与氯 - 羰基-4-甲基 - 哌嗪(CMP)游离碱 )或其酸加成盐在二氮杂双环[5.4.0]十一碳-7-烯(DBU)或DBU和其他碱的混合物存在下反应; (b)在合适的溶剂中用二苯甲酰基-D-酒石酸拆分外消旋佐匹克隆,其中通过加入腈溶剂将依佐溴隆的二苯甲酰基-D-酒石酸加成盐分离; (c)通过溶解在选自醇,酮或其混合物的溶剂中,随后通过加入腈溶剂沉淀来任选地纯化依佐溴隆的二苯甲酰基-D-酒石酸加成盐; (d)通过用碱性溶液处理转化依佐来普酮的二苯甲酰基-D-酒石酸加成盐以获得依曲普西酮游离碱(II); (e)通过溶解在腈溶剂中,然后加入酮溶剂来纯化佐佐匹克。 通过本发明方法获得的佐佐匹克(II)具有大于99.9%的手性纯度和较少量的有机挥发性杂质。 本发明还提供了佐佐匹克 - 二苯甲酰基-D-酒石酸盐(V)的新型结晶形式B及其制备方法。