T. Dahlgren et al., SYNTHESIS AND SEROTONIN RECEPTOR-BINDING PROPERTIES OF 5-SUBSTITUTED 3-(1',2',5',6'-TETRAHYDROPYRIDIN-3'-YL) INDOLES, Bioorganic & medicinal chemistry letters, 5(24), 1995, pp. 2963-2968
A semi-rigid 5-hydroxytryptamine (5-HT) analogue, RU28253 [5-methoxy-3
-(1',2',5',6'-tetrahydropyridin-3'-yl) indole], is a potent 5-HT1 and
5-HT2 agonist. It is isomeric to RU24969 [5-methoxy-3-(1',2',5',6'-tet
rahydropyridin-4'-yl) indole], a conformationally restricted 5-HT homo
logue, which has been extensively used in the study and classification
of 5-HT receptors. A series of RU28253 derivatives with diverse subst
ituents on indole 5-position were synthesized and their dissociation c
onstants determined at the 5-HT1 and 5-HT2 receptors.