申请人:Glaxo Group Limited
公开号:US04233302A1
公开(公告)日:1980-11-11
The invention relates to compounds of the general formula (I) ##STR1## and physiologically acceptable salts, N-oxides, hydrates and bioprecursors thereof, in which Y represents .dbd.O, .dbd.S, .dbd.CHNO.sub.2 or .dbd.NR.sub.3 where R.sub.3 represents hydrogen, nitro, cyano, lower alkyl, aryl, lower alkylsulphonyl or arylsulphonyl; R.sub.1 and R.sub.2, which may be the same or different, each represent hydrogen lower alkyl, cycloalkyl, lower alkenyl, aralkyl, hydroxy, lower trifluoroalkyl, lower alkyl substituted by hydroxy, lower alkoxy, amine, lower alkylamino or dialkylamino, or R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached form a 5 to 7 membered heterocyclic ring which may contain other heteroatoms or the group ##STR2## where R.sub.4 represents hydrogen or lower alkyl; 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, 1 or 2; m represents 2, 3 or 4; Alk represents a straight chain alkylene group of 1 to 3 carbon atoms; (except that n is not zero when X is oxygen and Q is a furan or thiophen ring system) q represents 2, 3 or 4 or can additionally represent zero or 1 when E is a --CH.sub.2 -group; p represents zero, 1 or 2; E represents --CH.sub.2 --, --O-- or --S--; and Z represents a monocyclic 5 or 6 membered carbocyclic or heterocyclic aromatic ring which may be optionally substituted by one or more groups or Z 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.5 and R.sub.6, which may be the same or different, each represent any of the groups defined for R.sub.1 and R.sub.2 ; (except that p is not zero when E is oxygen and Q' or Z is a furan or thiophen ring system). The compounds of formula (I) show pharmacological activity as selective histamine H.sub.2 -antagonists.
本发明涉及一般式(I)的化合物及其生理上可接受的盐、N-氧化物、水合物和生物前体,其中Y表示.dbd.O、.dbd.S、.dbd.CHNO.sub.2或.dbd.NR.sub.3,其中R.sub.3表示氢、硝基、氰基、低烷基、芳基、低烷基磺酰基或芳基磺酰基;R.sub.1和R.sub.2,可以相同也可以不同,分别表示氢、低烷基、环烷基、低烯基、芳基烷基、羟基、低三氟甲基、被羟基取代的低烷基、低烷氧基、胺基、低烷基氨基或二烷基氨基,或R.sub.1和R.sub.2与它们连接的氮原子一起形成一个5到7成员的杂环环,其中可能含有其他杂原子或基团##STR2##其中R.sub.4表示氢或低烷基;Q表示嵌入到分子其余部分的2-和5-位置之间的呋喃或噻吩环,或者是嵌入到分子其余部分的1-和3-或1-和4-位置之间的苯环;X表示--CH.sub.2、--O--或--S--;n表示零、1或2;m表示2、3或4;Alk表示1到3个碳原子的直链烷基;(除非X为氧且Q为呋喃或噻吩环系,否则n不为零)q表示2、3或4,当E为--CH.sub.2-基时,还可以表示零或1;p表示零、1或2;E表示--CH.sub.2--、--O--或--S--;Z表示一个单环5或6成员的碳环或杂环芳香环,可以选择性地被一个或多个基团取代,或者Z表示基团##STR3##其中Q'表示为Q所定义的任何环;Alk'表示为Alk所定义的任何基团;R.sub.5和R.sub.6,可以相同也可以不同,分别表示R.sub.1和R.sub.2所定义的任何基团;(除非E为氧且Q'或Z为呋喃或噻吩环系,否则p不为零)。式(I)化合物表现出作为选择性组胺H.sub.2-拮抗剂的药理活性。