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    • 144. 发明授权
    • Piperidine derivatives and process for their production
    • 哌啶衍生物及其生产工艺
    • US07022880B2
    • 2006-04-04
    • US10918247
    • 2004-08-13
    • Thomas E. D'Ambra
    • Thomas E. D'Ambra
    • C07C235/32
    • C07D211/22
    • The present invention relates to substantially pure piperidine derivative compounds of the formulae: wherein R1 is hydrogen or hydroxy; R2 is hydrogen; or R1 and R2 taken together form a second bond between the carbon atoms bearing R1 and R2; R3 is —COOH or —COOR4; R4 has 1 to 6 carbon atoms; A, B, and D are the substituents of their respective rings, each of which may be different or the same and are hydrogen, halogens, alkyl, hydroxy, alkoxy, or other substituents. A process of preparing such piperidine derivative compounds in substantially pure form is also disclosed.
    • 本发明涉及下列基本上纯的哌啶衍生物化合物:其中R 1是氢或羟基; R 2是氢; 或R 1和R 2一起形成带有R 1和R 2的碳原子之间的第二个键, ; R 3是-COOH或-COOR 4; R 4具有1至6个碳原子; A,B和D是它们各自的取代基,其各自可以不同或相同,并且是氢,卤素,烷基,羟基,烷氧基或其它取代基。 还公开了以基本上纯的形式制备这种哌啶衍生物化合物的方法。