Pharmaceutical pyridine derivatives, processes for preparing the same and intermediates therefor
申请人:TANABE SEIYAKU CO., LTD.
公开号:EP0848000A1
公开(公告)日:1998-06-17
A pyridine derivative of the formula (I):
wherein A is group of the following formulae:
R1 and R2 are each H, or protected or unprotected OH, R31, R41 and R42 are protected or unprotected hydroxymethyl, R32 is H, lower alkyl, or protected or unprotected hydroxymethyl, R33 is substituted or unsubstituted lower alkyl, and the dotted line means the presence or absence of a double bond' R5 and R6 are H, or protected or unprotected amino, or both combine together with the adjacent nitrogen to form substituted or unsubstituted heterocycle, or a pharmaceutically acceptable salt thereof, show excellent bronchoconstriction inhibitory activity and/or anti-inflammatory activity of airways, and are , useful in the prophylaxis or treatment of asthma.
式(I)的吡啶衍生物:
其中 A 为下式中的基团:
R1 和 R2 分别为 H,或受保护或未受保护的 OH,R31、R41 和 R42 为受保护或未受保护的羟甲基,R32 为 H、低级烷基或受保护或未受保护的羟甲基,R33 为取代或未取代的低级烷基,虚线表示存在或不存在双键' R5 和 R6 为 H、或受保护或未受保护的氨基,或两者与相邻的氮结合在一起形成取代或未取代的杂环,或其药学上可接受的盐,显示出优异的支气管收缩抑制活性和/或气道抗炎活性,可用于预防或治疗哮喘。