N1-arylsulfonyl-3-(1,2,3,6-tetrahydropyridin-4-yl)-1H-indole derivatives are potent and selective 5-HT6 receptor antagonists

The development of a series of N1-sulfonyl-3-(1,2,3,6-tetrahydropyridin-4-yl)indole 5-HT6 antagonists is described. Two analogs, 15g and 15y, had 0.4 and 3.0 nM affinity, and antagonized the production of adenylate cyclase at sub-nanomolar concentrations.