申请人:Glaxo Group Limited
公开号:US04777179A1
公开(公告)日:1988-10-11
The invention provides compounds of the general formula ##STR1## and physiologically acceptable salts and hydrates 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 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 ##STR2## where X represents --CH.sub.2 --, --O-- or --S--; n represents zero, 1 or 2; m represents 2, 3 or 4; and R.sub.7 represents hydrogen, alkyl, alkenyl, aralkyl, or C.sub.2-6 alkyl substituted by hydroxy or alkoxy; and R.sub.8 represents hydrogen, alkyl, alkenyl, aralkyl, hydroxyalkyl, acyloxyalkyl, alkoxyalkyl, aryloxyalkyl, aralkyloxyalkyl, aminoalkyl, alkylaminoalkyl, dialkylaminoalkyl, hydroxy or alkoxy, or the group NR.sub.10 R.sub.11 ; 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; where R.sub.2 represents hydrogen then R.sub.3 is in the 3-position; and where R.sub.2 represents halogen or C.sub.1-4 alkyl optionally substituted by hydroxy or C.sub.1-4 alkoxy, and R.sub.3 is in the 2-position, then R.sub.8 cannot represent amino C.sub.1-6 alkyl, C.sub.1-6 alkylamino C.sub.1-6 alkyl, di-C.sub.1-6 alkylamino C.sub.1-6 alkyl or a group NR.sub.10 R.sub.11. The compounds of formula (I) show pharmacological activity as selective histamine H.sub.2 -antagonists.
本发明提供了通式##STR1##的化合物及其生理上可接受的盐和水合物,其中R.sub.1和R.sub.2中的一个表示氢,卤素或C.sub.1-4烷基,该烷基可以选择性地由羟基或C.sub.1-4烷氧基取代,而另一个表示R.sub.4 R.sub.5 NAlk基团,其中Alk表示1至6个碳原子的直链或支链烷基链; R.sub.3可以位于2位或3位,表示##STR2##其中X表示--CH.sub.2 --,--O--或--S--; n表示零,1或2; m表示2, 3或4; R.sub.7表示氢,烷基,烯基,芳基烷基或由羟基或烷氧基取代的C.sub.2-6烷基; R.sub.8表示氢,烷基,烯基,芳基烷基,羟基烷基,乙酰氧基烷基,烷氧基烷基,芳氧基烷基,芳基烷氧基烷基,氨基烷基,烷基氨基烷基,二烷基氨基烷基,羟基或烷氧基,或基团NR.sub.10 R.sub.11; 前提是,如果R.sub.2表示R.sub.4 R.sub.5 Nalk基团,则R.sub.3位于2位; 如果R.sub.2表示氢,则R.sub.3位于3位; 如果R.sub.2表示卤素或C.sub.1-4烷基,可选择性地由羟基或C.sub.1-4烷氧基取代,并且R.sub.3位于2位,则R.sub.8不能表示氨基C.sub.1-6烷基,C.sub.1-6烷基氨基C.sub.1-6烷基,双C.sub.1-6烷基氨基C.sub.1-6烷基或基团NR.sub.10 R.sub.11。通式(I)化合物表现出选择性组胺H.sub.2-拮抗剂的药理活性。