The invention provides 2-(3,5-disubstituted pyridylalkyl amino)-5-pyridylmethyl-4-pyrimidone derivatives which are useful as histamine H.sub.1 -antagonists.
Pyrimidinone derivatives and pharmaceutical compositions containing them
申请人:SMITH KLINE & FRENCH LABORATORIES
LIMITED
公开号:EP0068834A2
公开(公告)日:1983-01-05
The present invention provides compounds of formula (II):
and their pharmaceutically acceptable salts which are useful as histamine H1-antagonists. In formula (II) R1 is C1-4 alkyl, and R2 is C3-4 alkoxy, halogen. oramino: R3 is a C1-3 alkylene group: and R4 is a 3-pyridyi. N-oxo-3-pyridyl, 6-methyl-3-pyridyl, N-oxo-6-methyl-3-pyridyl or 6-hydroxymethyl-3-pyridyl group.
The invention provides 2-(3,5-disubstituted pyridylalkyl amino)-5-pyridylmethyl-4-pyrimidone derivatives which are useful as histamine H.sub.1 -antagonists.