Antimigraine 1,2,5-thiadiazole derivatives of indolylalkyl-pyridnyl and
申请人:Bristol-Myers Squibb Company
公开号:US05618816A1
公开(公告)日:1997-04-08
A series of novel 5-(3,4-diamino-1,2,5-thiadiazole and S-oxide) derivatives of indolylalkylpiperazinyl pyridines and pyrimidines of Formula I are intended for use in the alleviation of vascular headaches. ##STR1## In Formula I, X is selected from S, SO and SO.sub.2.
A number of ranitidineanalogues in which the diamino-1,2,5-thiadiazole 1-oxide substructure bearing alkyl chains of different length is present as the urea equivalentgroup, were synthesised and studied for their lipophilic and H2 antagonist properties. Derivatives which displayed a logP < or = 3 behaved as competitive antagonists of histamine at H2 receptors present on guinea pig right atrium. The
New 3,4-diamino-1,2,5-thiadiazole oxide derivatives which are histamine H.sub.1 -antagonists. A specific compound of this invention is 3-[3-(N-propyl-N-2-pyridylamino)-propylamino]-4-(4-pyridylmethyl)amino-1,2 ,5-thiadiazole-1-oxide.