A series of bis-5-carboxamidoindoles were prepared and examined in a n
umber of serotonin assays (5HT(1A), 5HT(1D), 5HT(1E), and 5HT UT).(1)
They were found to exhibit good affinity for the 5HT(1A) and 5HT(1D) r
eceptor subtypes and to inhibit the 5HT uptake sites. Optimal 5HT(1D)
potency was achieved for bivalent analogs 5f and 5g, whose linkers spa
nned 7 and 8 alkyl units. Analogs with longer alkyl chain linkers (n=
10, 12), 5h and 5i, exhibited no selectivity for the 5HT(1D) receptor
over the 5HT(1A) receptor.