This invention relates to compounds of the general formula (I)
and physiologically acceptable salts and hydrates thereof, in which
R, represents a hydrogen atom or an alkyl, alkanoyl, aroyl or trifluoroalkyl group;
R2 represents a hydrogen atom or an alkyl or alkenyl group or C2-6 alkyl group substituted by a hydroxy or alkoxy group;
X represents a sulphur atom or NH;
Y represents an oxygen or sulphur atom or a bond;
m represents 1, 2 or 3;
n represents 2, 3 or 4;
A represents N and B represents CR3; or
A represents CR3 and B represents N; or
A and B each represent N; and
R3 represents a hydroxy, hydroxyalkyl, alkoxyalkyl, acyloxyalkyl or CH=NOH group; or
R3 represents the group CH2Z(CH2)rR4 in which r is 1 to 4 when Z is an oxygen atom, or r is 1 when Z is a sulphur atom, and R4 is a -CH2OH group, the group -CH=CH2, the group -CH2NR5R6 where R5 and R6 are each alkyl or the group -CH2NHR7 where R7 is alkyl; or
R3 represents an aralkyl or heteroalkyl group in which the alkyl portion is optionally substituted by a hydroxy or acyloxy group; or
R3 represents the group (CH2)qR8 where q is zero, 1, 2 or 3 and R8 is the group CH2NHC(=D)NHR9 where D is NCN or CHNO2 and R9 is an alkyl group; or the group COR10 where R10 is a hydrogen atom or a hydroxy, alkyl or NR11R12 group where R11 and R12 are the same or different and each represents a hydrogen atom or an alkyl group, or NR11R12 forms a 5 or 6 membered ring; or the group SO2R13 where R,3 is an alkyl or aryl group; or the group NHSO2R14 where R14 is an alkyl group; or the group NHCOR15 where R16 is a hydrogen atom or an alkyl, alkoxy, aryl, heteroaryl or NHR16 group where R16 is an aryl, alkyl or cycloalkyl group; or
R3 represents the group CH2SR17 where R17 is an alkyl or heteroaryl group; or
R3 represents a C2-4 straight or branched alkyl group substituted by two hydroxyl groups or the dihydroxyalkyl group may form a cyclic ketal structure of the formula
(Continuation next page)
where p is zero or 1, and R18 and R19, which may be the same or different, each represents a C1-4 alkyl group.
The compounds show pharmacological activity as selective histamine H2-antagonists.
本发明涉及通式 (I) 的化合物
及其生理上可接受的盐类和
水合物,其中
R,代表
氢原子或烷基、烷酰基、芳基或三
氟烷基;
R2 代表
氢原子或被羟基或烷
氧基取代的烷基或
烯基或 C2-6 烷基;
X 代表
硫原子或 NH;
Y 代表
氧原子或
硫原子或键;
m 代表 1、2 或 3
n 代表 2、3 或 4;
A 代表 N,B 代表 CR3;或
A 代表 CR3,B 代表 N;或
A 和 B 各自代表 N;以及
R3 代表羟基、羟烷基、烷
氧基烷基、酰
氧基烷基或 CH=NOH 基团;或
R3 代表基团 Z(
CH2)rR4,其中当 Z 为
氧原子时 r 为 1 至 4,或当 Z 为
硫原子时 r 为 1,且 R4 为- OH 基团、基团-CH= 、基团- NR5R6(其中 R5 和 R6 各为烷基)或基团- NHR7(其中 R7 为烷基);或
R3 代表芳烷基或杂烷基,其中烷基部分任选被羟基或酰
氧基取代;或
R3代表基团( )qR8,其中q为0、1、2或3,R8代表基团 NHC(=D)NHR9,其中D为NCN或
CHNO2,R9为烷基;或代表基团COR10,其中R10为
氢原子或羟基、烷基或NR11R12基团,其中R11和R12相同或不同,且各自代表
氢原子或烷基,或NR11R12形成5或6员环;或基团 SO2R13,其中 R,3 是烷基或芳基;或基团 NHSO2R14,其中 R14 是烷基;或基团 NHCOR15,其中 R16 是
氢原子或烷基、烷
氧基、芳基、杂芳基或 NHR16 基团,其中 R16 是芳基、烷基或
环烷基;或
R3 代表基团 SR17,其中 R17 是烷基或杂芳基;或
R3 代表被两个羟基取代的 C2-4 直链或支链烷基,或二羟基烷基可形成如下式的环
酮结构
(接下页)
其中 p 为 0 或 1,R18 和 R19(可以相同或不同)各代表一个 C1-4 烷基。
这些化合物具有选择性
组胺 H2-
拮抗剂的药理活性。