Agents for the Treatment of Overactive Detrusor. VIII. Synthesis and Pharmacological Properties of 4,4-Diphenyl-2-cycloalkenylamines Including FK584 and 3,3- or 4,4-Diphenylcycloalkylamines.
FK584[(-)-N-tert-butyl-4,4-diphenyl-2-cyclopentenylamine hydrochloride, (-)-4-HCl], a potential candidate for the treatment of overactive detrusor, was synthesized in a 4-step approach starting with Sharpless oxidation of cyclopentenol 6 (kinetic resolution). This epoxidation is a rare case in that the empirical rule does not work. Regio- and stereoselective introduction of tert-butylamine to the obtained