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.
该发明涉及通式(I)的化合物##STR1##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、较低的烷基、芳基、较低的烷基磺酰基或芳基磺酰基;R.sub.1和R.sub.2,可能相同也可能不同,每个代表氢、较低的烷基、环烷基、较低的烯基、芳基烷基、羟基、较低三氟甲基、被羟基、较低的烷氧基、胺基、较低的烷基胺基或二烷基胺基取代的较低烷基,或者R.sub.1和R.sub.2与它们连接的氮原子一起形成一个含有其他杂原子的5至7成员杂环,或者组##STR2##其中R.sub.4代表氢或较低的烷基;Q代表将其并入分子其余部分的2-和5-位置键合的呋喃或噻吩环,或者将其并入分子其余部分的1-和3-或1-和4-位置键合的苯环;X代表--CH.sub.2、--O--或--S--;n表示零、1或2;m表示2、3或4;Alk代表1至3个碳原子的直链烷基基团;(除非当X为氧且Q为呋喃或噻吩环系时n不为零)q表示2、3或4,或者当E为--CH.sub.2-基团时还可以表示零或1;p表示零、1或2;E代表--CH.sub.2--、--O--或--S--;Z代表可以选择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,或者Z代表组##STR3##其中Q'代表Q定义的任何环之一;Alk'代表Alk定义的任何基团;R.sub.5和R.sub.6,可能相同也可能不同,每个代表R.sub.1和R.sub.2定义的任何基团;(除非当E为氧且Q'或Z为呋喃或噻吩环系时p不为零)。通式(I)的化合物显示作为选择性组胺H.sub.2-拮抗剂的药理活性。