申请人:SMITH KLINE & FRENCH LABORATORIES
LIMITED
公开号:EP0113572A2
公开(公告)日:1984-07-18
The present invention provides compounds of formula (1):
and pharmaceutically acceptable salts thereof where
R1 and R2 are the same or different and are hydrogen, C1-6 alkyl, C1-6 alkoxy, or halogen;
R3 is C,.e alkyl, C3.8 cycloalkyl C1-6 alkyl, optionally substituted phenyl or optionally substituted phenyl C1-6 alkyl, where the optional substituents are one or more C1-6 alkyl, C1-6 alkoxy, halogen, or hydroxy groups; or is optionally substituted pyridyl or optionally substituted pyridyl C1-6 alkyl where the optional substituents are one or more C1-6 alkyl or C1-6 alkoxy groups or halogen atoms;
a is from 2 to 4
b is from 1 to 6
R4 is hydrogen, optionally substituted phenyl where the optional substituents are one or more C1-6 alkyl, C1-6 alkoxy, nitro or hydroxy groups or halogen atoms, or a methylenedioxy group,
or is an optionally substituted pyridyl group where the optional substituents are one or more C1-6 alkyl, C1-6 alkoxy groups or halogen atoms;
or is a C3-8 cycloalkyl group; or is N-oxo-3-pyridyl; N-oxo-6-methyl-3-pyridyl;
6-hydroxymethyl-3-pyridyl; N-oxo-4,6-dimethyl-3-pyridyl; 6-hydroxymethyl-4-methyl-3-pyridyl; N-oxo-5,6-dimethyl-3-pyridyl; 6-hydroxymethyl-5-methyl-3-pyridyl; or N-oxo-4-pyridyl, or is a pyridone group in which the nitrogen atom is optionally substituted with C1-6 alkyl. The compounds of this invention are useful as histamine H,-antagonists.
本发明提供了式(1)化合物:
及其药学上可接受的盐类,其中
R1 和 R2 相同或不同,并且是氢、C1-6 烷基、C1-6 烷氧基或卤素;
R3 是 C,.e烷基、C3.8 环烷基 C1-6烷基、任选取代的苯基或任选取代的苯基 C1-6烷基,其中任选取代基是一个或多个 C1-6烷基、C1-6烷氧基、卤素或羟基;或者是任选取代的吡啶基或任选取代的吡啶基 C1-6烷基,其中任选取代基是一个或多个 C1-6烷基或 C1-6烷氧基或卤素原子;
a 是 2 至 4
b 是 1 至 6
R4是氢、任选取代的苯基(其中任选取代基是一个或多个C1-6烷基、C1-6烷氧基、硝基或羟基或卤素原子)或亚甲基二氧基、
或任选取代基为一个或多个 C1-6 烷基、C1-6 烷氧基或卤素原子的吡啶基;
或 C3-8 环烷基;或 N-氧代-3-吡啶基;N-氧代-6-甲基-3-吡啶基;
6-羟甲基-3-吡啶基;N-氧代-4,6-二甲基-3-吡啶基;6-羟甲基-4-甲基-3-吡啶基;N-氧代-5,6-二甲基-3-吡啶基;6-羟甲基-5-甲基-3-吡啶基;或 N-氧代-4-吡啶基,或氮原子被 C1-6 烷基任选取代的吡啶酮基团。本发明的化合物可用作组胺 H拮抗剂。