申请人:Glaxo Group Limited
公开号:US04317819A1
公开(公告)日:1982-03-02
The invention provides compounds of general formula ##STR1## and physiologically acceptable salts, hydrates and bioprecursors thereof, in which Y and Z, which may be the same or different, each represent oxygen, sulphur, .dbd.CHNO.sub.2 or .dbd.NR.sub.3 where R.sub.3 is hydrogen, nitro, cyano, lower alkyl, aryl, alkylsulphonyl or arylsulphonyl; p has a value from 2 to 12; R.sub.1 represents ##STR2## in which R.sub.4 and R.sub.5 which may be the same or different, each represent hydrogen, lower alkyl, cycloalkyl, lower alkenyl, aralkyl or lower alkyl interrupted by an oxygen atom or a group >N-R.sub.6 in which R.sub.6 represents hydrogen or lower alkyl, or R.sub.4 and R.sub.5 together with the nitrogen atom to which they are attached form a 5 to 7-membered saturated heterocyclic ring which may contain an additional oxygen atom or the group >NR.sub.6 ; Q represents a furan or thiophen ring in which incorporation into the rest of the molecule is through bonds at the 2 and 5 positions, or a benzene ring in which incorporation into the rest of the molecule is through bonds at the 1 and 3 or 1 and 4 positions; X represents --CH.sub.2 --, --O-- or --S--; n represents zero or 1; m represents 2, 3 or 4 and Alk represents a straight chain alkylene group of 1 to 3 carbon atoms, and R.sub.2 represents lower alkyl or the group --(CH.sub.2).sub.y E(CH.sub.2).sub.x G in which y represents 2, 3 or 4 or can additionally represent zero or 1 when E is a --CH.sub.2 -- group, x represents zero, 1 or 2; E represents --CH.sub.2 --, --O-- or --S--; and G represents a monocyclic 5 or 6 membered carbocyclic or heterocyclic aromatic ring, or G represents the group ##STR3## where Q' represents any of the rings defined for Q; Alk' represents any of the groups defined for Alk; and R.sub.4 ' and R.sub.5 ' which may be the same or different represent any of the groups defined for R.sub.4 or R.sub.5. The compounds of formula (I) have pharmacological activity as selective histamine H.sub.2 -antagonists.
本发明提供了一般式##STR1##的化合物及其生理上可接受的盐、水合物和生物前体,其中Y和Z可以相同或不同,分别表示氧、硫、.dbd.CHNO.sub.2或.dbd.NR.sub.3,其中R.sub.3是氢、硝基、氰基、低烷基、芳基、烷基磺酰基或芳基磺酰基;p的值为2到12;R.sub.1表示##STR2##其中R.sub.4和R.sub.5可以相同或不同,分别表示氢、低烷基、环烷基、低烯基、芳基烷基或被氧原子或群体>N-R.sub.6中断的低烷基,其中R.sub.6表示氢或低烷基,或者R.sub.4和R.sub.5与它们连接的氮原子一起形成一个5到7个成员的饱和杂环环,该环可以含有一个额外的氧原子或群体>NR.sub.6;Q表示通过2和5位置的键连接到分子其余部分的呋喃或噻吩环,或者通过1和3或1和4位置的键连接到分子其余部分的苯环;X表示--CH.sub.2 --、--O--或--S--;n表示零或1;m表示2、3或4,Alk表示1到3个碳原子的直链烷基,R.sub.2表示低烷基或群体--(CH.sub.2).sub.yE(CH.sub.2).sub.xG,其中y表示2、3或4,或者当E是--CH.sub.2 --群体时,还可以表示零或1,x表示零、1或2;E表示--CH.sub.2 --、--O--或--S--;G表示单环5或6成员的碳环或杂环芳香环,或者G表示群体##STR3##其中Q'表示Q定义的任何环,Alk'表示Alk定义的任何基团,R.sub.4 '和R.sub.5 '可以相同或不同,表示R.sub.4或R.sub.5定义的任何基团。式(I)的化合物具有选择性组胺H.sub.2-拮抗剂的药理活性。