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    • 6. 发明公开
    • 옥소쿠아제팜 제조방법
    • 制备OXOQUAZEPAM的方法
    • KR1020000047544A
    • 2000-07-25
    • KR1019990045471
    • 1999-10-20
    • 히사미쓰 메디카루 가부시키가이샤
    • 오가와마사키기타후미오
    • C07D243/24
    • C07D243/24
    • PURPOSE: A method of preparing oxoquazepam is provided, which is an intermediate material for quazepam CONSTITUTION: A method of preparing oxoquazepam shown by the following formula (2), which comprises reacting 2,2,2-trifluoroethyl trifluoromethanesulfonate with 7-chloro-1,3-dihydro-5-(2-fluorophenyl)-2H-1,4-benzodiazepine-2-one shown by the following formula (1). Oxoquazepam used as an intermediate material for medicines must include only a small amount of impurities, in particular, only a small amount of analogous materials. Therefore, a method of preparing high purity oxoquazepam with a high yield has been demanded. Ethyl acetate or tetrahydrofuran may be used as a solvent. If a solvent having a polarity higher than that of these compounds such as acetone, acetonitrile, or dimethylformamide is used, O-alkylates are produced at about a 30% yield. If a solvent having a polarity lower than that of these compounds such as toluene is used, the reaction may scarcely proceed and the raw materials are left unreacted. It is preferable to use ethyl acetate or tetrahydrofuran in an amount so that the polarity of the solvent is not affected by the polarity of the solute, specifically, 5 times or more of 7-chloro-1,3-dihydro-5-(2-fluorophenyl)-2H-1,4-benzodiazepine-2-one.
    • 目的:提供一种制备氧喹西泮的方法,该方法是一种标准的中间体材料。一种制备下列式(2)所示氧代喹西泮的方法,该方法包括使2,2,2-三氟乙基三氟甲磺酸酯与7-氯-1 ,由下式(1)表示的3-二氢-5-(2-氟苯基)-2H-1,4-苯并二氮杂-2-酮。 用作药物中间体材料的奥克喹西泮必须仅含有少量杂质,特别是少量的类似物质。 因此,需要一种以高产率制备高纯度氧喹西泮的方法。 可以使用乙酸乙酯或四氢呋喃作为溶剂。 如果使用极性高于这些化合物如丙酮,乙腈或二甲基甲酰胺的溶剂,则以约30%的产率生产O-烷基化物。 如果使用极性低于这些化合物如甲苯的溶剂,则反应几乎不能进行,原料未反应。 优选使用乙酸乙酯或四氢呋喃,其量使得溶剂的极性不受溶质的极性的影响,特别是7-氯-1,3-二氢-5-(2 氟苯基)-2H-1,4-苯并二氮杂-2-酮。