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    • 6. 发明授权
    • Process for the preparation of 4-substituted azetidinone derivatives
    • 制备4-取代的氮杂环丁酮衍生物的方法
    • US06340751B1
    • 2002-01-22
    • US09357153
    • 1999-07-19
    • Takao SaitoToshiyuki MurayamaTakaji MatsumotoTakashi Miura
    • Takao SaitoToshiyuki MurayamaTakaji MatsumotoTakashi Miura
    • C07F718
    • C07D413/06C07D205/08Y02P20/55
    • Disclosed is a process for the preparation of a 4-substituted azetidinone derivative, which comprises reacting an azetidinone derivative and an amide compound in the presence of a magnesium compound such as those represented by the following formulas (II): and (IV): represented by the following formula (III): MgR5R6  (III) wherein R5 represents a C1-12 alkyl group, a C2-5 alkenyl group, a 5- to 8-membered alicyclic group which may be substituted by a lower C1-4 alkyl group, a phenyl group which may be substituted by a lower C1-4 alkyl group, a lower C1-4 alkoxy group or a halogen atom or a benzyl group which may be substituted by a lower C1-4 alkyl group, a lower C1-4 alkoxy group or a halogen atom, and R6 represents a halogen atom, a methanesulfonyloxy group, a benzenesulfonyloxy group, a p-toluenesulfonyloxy group, a trifluoromethanesulfonyloxy group, an acetoxy group which may be substituted by a halogen atom or a cyano group or an OR7 group (R7 representing a lower C1-4 alkyl group, a substituted or unsubstituted phenyl group or a substituted or unsubstituted benzyl group). The process provides an industrially excellent process for the preparation of a 4-substituted azetidinone derivative which permits the selective preparation of an intermediate for the synthesis of a carbapenem antibacterial agent having a desired 1-&bgr;′ configuration.
    • 公开了制备4-取代的氮杂环丁酮衍生物的方法,该方法包括在镁化合物如下式(II)和(IV)所示的那些镁化合物存在下使氮杂环丁酮衍生物与酰胺化合物反应:代表 通过下式(III)表示:其中R5表示C1-12烷基,C2-5烯基,可被低级C1-4烷基取代的5至8元脂环基,苯基 可以被低级C 1-4烷基,低级C 1-4烷氧基或卤素原子取代的苯基,或可以被低级C 1-4烷基取代的苄基,低级C 1-4烷氧基或 卤原子,R6表示卤原子,甲磺酰氧基,苯磺酰氧基,对甲苯磺酰氧基,三氟甲磺酰氧基,可被卤素原子或氰基取代的乙酰氧基或OR7基(R7表示 低级C 1-4烷基,取代的o R未取代的苯基或取代或未取代的苄基)。 该方法提供了制备4-取代的氮杂环丁酮衍生物的工业上优异的方法,其允许选择性制备用于合成具有所需1-β'构型的碳青霉烯类抗菌剂的中间体。
    • 7. 发明授权
    • Method for manufacturing (3S,4R)-4-[(R)-1′-formylethyl]azetidin-2-one derivatives
    • 制备(3S,4R)-4 - [(R)-1'-甲酰乙基]氮杂环丁-2-酮衍生物的方法
    • US06169179A
    • 2001-01-02
    • US09329335
    • 1999-06-10
    • Howard AlperTakao SaitoTakashi Miura
    • Howard AlperTakao SaitoTakashi Miura
    • C07D20500
    • C07D205/08Y02P20/55
    • A method for manufacturing (3S,4R)-4-[(R)-1′-formylethyl]azetidin-2-one derivatives represented by formula (3) wherein R1 represents a hydrogen atom or a protective group, through asymmetric hydroformylation of 4-vinylazetidin-2-one represented by formula (1) wherein R1 has the same meaning as described above; in the presence of a rhodium complex and a (2S,4S)-diphosphine compound represented by formula (2) wherein R2 represents a phenyl group which may be substituted with 1-5 substituent(s) selected from a lower alkyl group, a lower alkoxy group, and a halogen atom. By use of both an inexpensive optically active diphosphine compound and a rhodium complex as catalysts, intermediate compounds important for carbapenem antibiotics can be manufactured with high selectivity and efficiency.
    • 制备由式(3)表示的(3S,4R)-4 - [(R)-1'-甲基乙基]氮杂环丁烷-2-酮衍生物的方法,其中R 1表示氢原子或保护基,通过不对称加氢甲酰化4 (1)表示的1-乙烯基氮杂环丁烷-2-酮,其中R1具有与上述相同的含义; 在铑络合物和由式(2)表示的(2S,4S) - 二膦化合物的存在下,其中R 2表示可被1-5个选自以下的取代基取代的苯基:低级烷基,低级 烷氧基和卤素原子。通过使用廉价的光学活性二膦化合物和铑配合物作为催化剂,可以以高选择性和高效率制造对碳青霉烯类抗生素重要的中间体化合物。