申请人:Glaxo Group Limited
公开号:US04304780A1
公开(公告)日:1981-12-08
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 ##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.
该发明涉及通式(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代表.dbd.O、.dbd.S、.dbd.CHNO.sub.2或.dbd.NR.sub.3,其中R.sub.3代表氢、硝基、氰基、低碳基、芳基、低碳基磺酰基或芳基磺酰基;R.sub.1和R.sub.2,可相同可不同,各代表氢、低碳基、环烷基、低烯基、芳基烷基、羟基、低三氟甲基、被羟基取代的低碳基、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与它们所附着的氮原子共同形成一个含有其他杂原子或基团的5到7成员杂环,其中R.sub.4代表氢或低碳基;Q代表通过2-和5-位置的键结合到分子其余部分的呋喃或噻吩环,或通过1-和3-或1-和4-位置的键结合到分子其余部分的苯环;X代表--CH.sub.2 --、--O--或--S--;n代表零、1或2;m代表2、3或4;Alk代表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代表2、3或4,或当E为--CH.sub.2 --基团时,还可以表示零或1;p代表零、1或2;E代表--CH.sub.2 --、--O--或--S--;Z代表可以选择性地被一个或多个基团取代的单环5或6成员碳环或杂环芳香环,或Z代表##STR3##其中Q'表示为Q定义的任何环;Alk'表示为Alk定义的任何基团;R.sub.5和R.sub.6,可相同可不同,各代表R.sub.1和R.sub.2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)。通式(I)的化合物表现出选择性组胺H.sub.2-拮抗剂的药理活性。