A compound of formula I
in which formula
R1 and R2, which may be the same or different, each represents a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms or, together with the nitrogen atom to which they are attached, R1 and R2 form a 4 to 8-membered ring which may contain an oxygen atom or another nitrogen atom, which nitrogen atom may have an alkyl group having from 1 to 4 carbon atoms as substituent.
X represents an oxygen atom or a group NR4 in which R4 represents a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, a phenyl group or a phenalkyl group, the alkyl moiety of which has from 1 to 4 carbon atoms.
an alkyl, phenyl or phenalkyl group being unsubstituted or substituted, or
R4 represents a nitrogen protecting group;
m represents an integer of from 1 to 4;
n represents the integer 1 or 2; and
R3 represents a group of formula II, III, IV, V or VI
in which formulae
R5 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; and R6 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, an alkenyl group having from 2 to 4 carbon atoms, or an alkynyl group having 3 or 4 carbon atoms has histamine H-2 antagonist activity, and may be used to produce medicaments.
一种式 I 的化合物
其中式
R1和R2(可以相同或不同)各自代表一个氢原子、一个具有 1 至 4 个碳原子的烷基,或者,R1和R2与它们所连接的氮原子一起形成一个 4 至 8 元环,该环可以包含一个氧原子或另一个氮原子,该氮原子可以具有一个具有 1 至 4 个碳原子的烷基作为取代基。
X 代表氧原子或基团 NR4,其中 R4 代表氢原子、具有 1 至 4 个碳原子的烷基、苯基或 苯烷基,其烷基具有 1 至 4 个碳原子。
未取代或取代的烷基、苯基或苯烷基,或
R4 代表氮保护基团;
m 代表 1 至 4 的整数;
n 代表 1 或 2 的整数;以及
R3 代表式 II、III、IV、V 或 VI 的基团
在这些式中
R5 代表氢原子或具有 1 至 4 个碳原子的烷基;以及 R6 代表氢原子或具有 1 至 4 个碳原子的烷基、具有 2 至 4 个碳原子的烯基或具有 3 或 4 个碳原子的炔基具有
组胺 H-2 拮抗剂活性,可用于生产药物。