The invention provides amide derivatives of the general formula (I) ##STR1## wherein R.sup.1 is a hydrogen atom or a C.sub.1-6 alkyl group; Y represents a group --(CH.sub.2).sub.m --, where m represents 2, 3 or 4 or a group --X(CH.sub.2).sub.p, where p represents 2 or 3, X represents an oxygen or a sulphur atom or a group NR.sup.5, where R.sup.5 is a C.sub.1-6 alkyl group, and X is attached to the benzene ring moiety of the molecule; and Im represents an imidazolyl group of the formula: ##STR2## wherein one of the groups represented by R.sup.2, R.sup.3 and R.sup.4 is a hydrogen atom or a C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-6 alkenyl, phenyl or phenylC.sub.1-3 alkyl group, and each of the other two groups, which may be the same or different, represents a hydrogen atom or a C.sub.1-6 alkyl group; and physiologically acceptable salts and solvates thereof. The compounds of formula (I) are potent and selective antagonists of 5-hydroxytryptamine at 5-HT.sub.3 receptors and are useful, for example, in the treatment of psychotic disorders, anxiety and nausea and vomiting.
本发明提供了一般式(I)的酰胺衍
生物: ##STR1##其中,R.sup.1是氢原子或C.sub.1-6烷基基团;Y代表--(CH.sub.2).sub.m--基团,其中m代表2、3或4,或--X(CH.sub.2).sub.p基团,其中p代表2或3,X代表氧原子、
硫原子或--NR.sup.5基团,其中R.sup.5是C.sub.1-6烷基基团,并且X连接到分子的苯环部分;Im代表下列式的
咪唑基团: ##STR2##其中,由R.sup.2、R.sup.3和R.sup.4代表的基团中的一个是氢原子或C.sub.1-6烷基、C.sub.3-7环烷基、C.sub.3-6烯基、苯基或苯基C.sub.1-3烷基基团,另外两个基团(可以相同也可以不同)分别代表氢原子或C.sub.1-6烷基基团;以及其生理上可接受的盐和溶剂合物。式(I)化合物是5-羟
色胺受体5-HT.sub.3的有效和选择性拮抗剂,例如在治疗精神疾病、焦虑和恶心呕吐方面有用。