INDOLE DERIVATIVES

摘要

Disclosed are compounds of formula I (See formula I) wherein R1 is a hydrogen atom, a C1-C6 alkyl group, benzyl or an indolyl carbonyl group, R2 is a saturated or unsaturated 5- to 8-membered heterocyclic group containing as a hetero atom one or more nitrogen atoms, the heterocyclic group is optionally substituted at an N or C atom by a C1-C6 alkyl or aralkyl group, n is an integer of 1 to 5 and one or more hydrogen atoms, in an alkylene chain -(CH2)n- are optionally substituted by a C1-C6 alkyl, phenyl, benzyl and/or hydroxyl group, physiologically acceptable salts and quaternary ammonium salts thereof. The compounds are selective antagonists of 5-HT3 receptors and are useful in the treatment of psychotic disorders, neurotic diseases, gastric stasis symptoms, gastrointestinal disorders, nausea and vomiting.