申请人:Mitsubishi Chemical Corporation
公开号:US05567699A1
公开(公告)日:1996-10-22
This invention provides thiadiazinone derivatives represented by the following formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom or C.sub.1 -C.sub.5 alkyl, R.sup.2 represents a 5- or 6-membered heterocyclic ring having (a) 1-3 nitrogen atoms, (b) a oxygen atom, (c) one sulfur atom, (d) 1-3 nitrogen atoms and one oxygen atom, or (e) 1-3 nitrogen atoms and one sulfur atom each of which rings may optionally be substituted by at least one substituent selected from the group consisting of C.sub.1 -C.sub.5 alkyl, cyano, hydroxy, C.sub.1 -C.sub.5 alkoxy, amino, C.sub.1 -C.sub.5 alkylamino, C.sub.2 -C.sub.6 dialkylamino, C.sub.2 -C.sub.5 acylamino, carboxyl, C.sub.2 -C.sub.5 alkoxycarbonyl and carbamoyl; or a pharmaceutically acceptable salt thereof. The compounds according to the present invention have an excellent cardiotonic activity, and are useful as active ingredients of a cardiotonic drug.
本发明提供了以下式(I)所表示的噻二唑酮衍生物
##STR1##
其中,R.sup.1代表氢原子或C.sub.1-C.sub.5烷基,R.sup.2代表具有(a)1-3个氮原子、(b)一个氧原子、(c)一个硫原子、(d)1-3个氮原子和一个氧原子或(e)1-3个氮原子和一个硫原子的5-或6-成员杂环,每个环可以选择地被至少一个从C.sub.1-C.sub.5烷基、氰基、羟基、C.sub.1-C.sub.5烷氧基、氨基、C.sub.1-C.sub.5烷基氨基、C.sub.2-C.sub.6二烷基氨基、C.sub.2-C.sub.5酰胺基、羧基、C.sub.2-C.sub.5烷氧羰基和氨基甲酰基的取代基所取代;或其药学上可接受的盐。本发明的化合物具有优异的心脏强效作用,并且可用作心脏强效药物的活性成分。