申请人:Glaxo Group Limited
公开号:US04442110A1
公开(公告)日:1984-04-10
The invention relates to compounds of the general formula (I) ##STR1## and physiologically acceptable salts, hydrates and bioprecursors thereof, in which R.sub.1 and R.sub.2, which may be the same or different, each represent hydrogen, C.sub.1-10 alkyl, cycloalkyl, alkenyl, alkynyl, aralkyl, trifluoroalkyl or alkyl substituted by hydroxy, alkoxy, amino, alkylamino, dialkylamino or cycloalkyl, or R.sub.1 and R.sub.2 may together with the nitrogen atom to which they are attached form a 5 to 10 membered alicyclic heterocyclic ring which may be saturated or may contain at least one double bond, may be unsubstituted or may be substituted by one or more C.sub.1-3 alkyl groups or a hydroxy group and/or may contain another heteroatom; Alk represents a straight or branched alkylene chain of 1 to 6 carbon atoms; 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, the furan ring optionally bearing a further substituent R.sub.7 adjacent to the group R.sub.1 R.sub.2 N-Alk-, or Q represents 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; R.sub.7 represents halogen or C.sub.1-4 alkyl which may be substituted by hydroxy or C.sub.1-4 alkoxy; X represents --CH.sub.2 --, ##STR2## --O-- or --S-- where R.sub.6 represents hydrogen or methyl; n represents zero, 1 or 2; m represents 2, 3 or 4; R.sub.3 represents hydrogen, alkyl, alkenyl, aralkyl, hydroxyalkyl having at least two carbon atoms, alkoxyalkyl or aryl; and R.sub.4 and R.sub.5, which may be the same or different, each represent hydrogen, alkyl, alkyl substituted by hydroxy or C.sub.1-3 alkoxy, alkenyl, aralkyl or heteroaralkyl or R.sub.4 and R.sub.5 may together with the nitrogen atom to which they are attached form a 5 to 7-membered saturated heterocyclic ring which may contain another heteroatom, or the group ##STR3## or R.sub.4 and R.sub.5 taken together may represent the group .dbd.CR.sub.8 R.sub.9 where R.sub.8 represents aryl or heteroaryl and R.sub.9 represents hydrogen or alkyl. Preferably when X represents an oxygen atom or ##STR4## and n is zero, then Q only represents a benzene ring. The compounds of formula (I) show pharmacological activity as selective histamine H.sub.2 -antagonists.
本发明涉及通式(I)的化合物,以及其生理上可接受的盐、水合物和生物前体,其中R.sub.1和R.sub.2,可以相同也可以不同,分别代表氢、C.sub.1-10烷基、环烷基、烯基、炔基、芳基烷基、三氟甲基或被羟基、烷氧基、氨基、烷基氨基、二烷基氨基或环烷基取代的烷基,或R.sub.1和R.sub.2可以与它们附着的氮原子一起形成一个5到10个成员的脂环杂环,该脂环杂环可以饱和或可以含有至少一个双键,可以是未取代的或可以被一个或多个C.sub.1-3烷基基团或羟基基团取代,也可以包含另一个杂原子;Alk代表1到6个碳原子的直链或支链烷基链;Q代表呋喃或噻吩环,其中结合到分子的其余部分是通过2-和5-位置的键,呋喃环可以选择地带有R.sub.1 R.sub.2 N-Alk-基团相邻的另一个取代基R.sub.7,或Q代表苯环,其中结合到分子的其余部分是通过1-和3-或1-和4-位置的键;R.sub.7代表卤素或C.sub.1-4烷基,可以被羟基或C.sub.1-4烷氧基取代;X代表--CH.sub.2 --、##STR2## --O--或--S--,其中R.sub.6代表氢或甲基;n代表零、1或2;m代表2、3或4;R.sub.3代表氢、烷基、烯基、芳基烷基、至少有两个碳原子的羟基烷基、烷氧基烷基或芳基;R.sub.4和R.sub.5,可以相同也可以不同,分别代表氢、烷基、被羟基或C.sub.1-3烷氧基取代的烷基、烯基、芳基烷基或杂芳基烷基,或R.sub.4和R.sub.5可以与它们附着的氮原子一起形成一个5到7个成员的饱和杂环,该杂环可以包含另一个杂原子,或者是基团##STR3##或R.sub.4和R.sub.5一起代表.dbd.CR.sub.8 R.sub.9基团,其中R.sub.8代表芳基或杂芳基,R.sub.9代表氢或烷基。当X代表氧原子或##STR4##且n为零时,最好Q仅代表苯环。公式(I)的化合物表现出选择性组胺H.sub.2-拮抗剂的药理活性。