| abstract |
A compound of the chemical formula (I) and its pharmaceutically acceptable salt, wherein Y is C2-C4 alkylene; Z is a valence bond or C1-C6 alkylene; R<1> is substituted or unsubstituted aryl (e.g., phenyl and naphthyl) or heteroaryl (e.g., thienyl and furyl); R<2> is hydrogen or C1-C6 alkyl; R<3> is hydrogen, hydroxy or the like; R<4> is substituted or unsubstituted benzyl or the like. Typical examples are (2S*,3S*,4S*,5R*)-4-Carboxy-3-[N-(5-Isopropyl-2-methoxy-benzyl)amino]-5-methyl-2-phenylpyrrolidine and (2S*,3S*,5S*)-5-Carboxy-3-[N-(2-methoxy-5-trifluoromethoxybenzyl)amino]-2-phenylpiperidine. The novel substituted azaheterocyclecarboxylic acids in this invention have excellent substance P antagonistic activity and are thus useful for the treatement of gastrointestinal disorders, central nervous system disorders, allergy, inflammatory diseases, asthma, pain, emesis or migraine in mammals, especially humans. |