申请人:Glaxo Group Limited
公开号:US04382929A1
公开(公告)日:1983-05-10
The invention provides compounds of the general formula (I) ##STR1## and physiologically acceptable salts, hydrates and bioprecursors thereof, in which one of R.sub.1 and R.sub.2 represents hydrogen, halogen or a C.sub.1-4 alkyl group which may be optionally substituted by hydroxy or C.sub.1-4 alkoxy, and the other represents the group R.sub.4 R.sub.5 NAlk-- in which R.sub.4 represents hydrogen, C.sub.1-10 alkyl, cycloalkyl, alkenyl, alkynyl, aralkyl, heteroaralkyl, trifluoroalkyl, or alkyl substituted by hydroxy, alkoxy, amino, alkylamino, dialkylamino or cycloalkyl, and R.sub.5 represents hydrogen or a C.sub.1-4 alkyl group or R.sub.4 and R.sub.5 may, together with the nitrogen atom to which they are attached, form a 5 to 10 membered 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 selected from oxygen and sulphur; Alk represents a straight or branched alkylene chain of 1 to 6 carbon atoms; R.sub.3, which may be in either the 2 or 3-position, represents the group ##STR2## where X represents --CH.sub.2 --, --O-- or --S--; n represents zero, 1 or 2; m represents 2, 3 or 4; and where Y represents S, O, CHNO.sub.2 or NR.sub.7 where R.sub.7 is nitro, cyano, alkylsulphonyl or arylsulphonyl; R.sub.6 represents hydrogen, alkyl, alkenyl, alkynyl, alkoxyalkyl or aralkyl; with the provisos that where R.sub.2 represents the group R.sub.4 R.sub.5 NAlk then R.sub.3 is in the 2-position; and where R.sub.2 represents hydrogen then R.sub.3 is in the 3-position. The compounds of formula (I) show pharmacological activity as selective histamine H.sub.2 -- antagonists.
该发明提供了一般式(I)的化合物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中的一个代表氢、卤素或C.sub.1-4烷基基团,该基团可以选择性地被羟基或C.sub.1-4烷氧基取代,另一个代表基团R.sub.4 R.sub.5 NAlk--,其中R.sub.4代表氢、C.sub.1-10烷基、环烷基、烯基、炔基、芳基烷基、杂环芳基烷基、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,R.sub.5代表氢或C.sub.1-4烷基或R.sub.4和R.sub.5可以与它们连接的氮原子一起形成一个5到10环,该环可以饱和或含有至少一个双键,可以未取代或可以被一个或多个C.sub.1-3烷基或一个羟基取代,或者可以含有另一个从氧和硫选择的杂原子;Alk代表1到6个碳原子的直链或支链烷基链;R.sub.3,可以位于2或3位置,代表基团##STR2##其中X代表--CH.sub.2--、--O--或--S--;n代表零、1或2;m代表2、3或4;Y代表S、O、CHNO.sub.2或NR.sub.7,其中R.sub.7为硝基、氰基、烷基磺酰基或芳基磺酰基;R.sub.6代表氢、烷基、烯基、炔基、烷氧基烷基或芳基烷基;但是如果R.sub.2代表基团R.sub.4 R.sub.5 NAlk,则R.sub.3在2位置;如果R.sub.2代表氢,则R.sub.3在3位置。式(I)的化合物显示为选择性组织胺H.sub.2--拮抗剂的药理活性。