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    • 131. 发明授权
    • Process for preparing azetidin-2-one derivatives
    • 制备氮杂环丁-2-酮衍生物的方法
    • US5322939A
    • 1994-06-21
    • US909678
    • 1992-07-07
    • Tadakatsu MandaiJiro Tsuji
    • Tadakatsu MandaiJiro Tsuji
    • B01J31/18C07B61/00C07D205/08C07D205/10C07B43/06
    • C07D205/08C07D205/10Y02P20/55
    • A process for preparing an azetidin-2-one derivative represented by formula (2): ##STR1## wherein R.sup.4 and R.sup.5, which may be the same or different, each represents a hydrogen atom, an alkyl group having from 1 to 8 carbon atoms, or an alkyl group having from 1 to 8 carbon atoms substituted with an alkoxy group, an acyl group, or an alkoxycarbonyl group; R.sup.6 represents a protective group for an amino group; and R.sup.7 represents a vinylidene group of formula ##STR2## or an acetylene group of formula ##STR3## wherein R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom or an alkyl group having from 1 to 8 carbon atoms; and R.sup.8 represents an alkyl group having from 1 to 8 carbon atoms corresponding to R.sup.2 or R.sup.3, which comprises reacting a propargyl alcohol derivative represented by formula (1): ##STR4## wherein R.sup.1 represents an alkyl group having from 1 to 6 carbon atoms, a phenyl group, or a halogen-substituted phenyl group; R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are as defined above, with carbon monoxide in the presence of a palladium complex. The compound (2), an intermediate of penem antibiotics, can be obtained through one reaction step in good yield.
    • 制备由式(2)表示的氮杂环丁-2-酮衍生物的方法:其中R 4和R 5可以相同或不同,各自表示氢原子,具有1〜 8个碳原子或具有1至8个碳原子被烷氧基,酰基或烷氧基羰基取代的烷基; R6表示氨基的保护基; 并且R 7表示式“IMAGE”的亚乙烯基或式“IMAGE”的乙炔基,其中R 2和R 3可以相同或不同,各自表示氢原子或具有1至8个碳原子的烷基; R8代表对应于R2或R3的具有1至8个碳原子的烷基,其包括使由式(1)表示的炔丙醇衍生物:其中R 1表示具有1至6个碳原子的烷基 碳原子,苯基或卤素取代的苯基; R2,R3,R4,R5,R6和R7如上定义,与钯络合物存在下的一氧化碳。 化合物(2)是penin抗生素的中间体,可以通过一个反应步骤以良好的产率获得。