3-Quinuclidinol, (-)- → HCID 86641068, compound

Participants

Reaction Steps

To a solution of 2-phenyl-5,6-dihydro-4H-cyclopenta[b]thiophene-3-amine (110 mg) in pyridine (2 mL) was added (3R)-quinuclidin-3-ol and (3R)-1-azabicyclo[2.2.2]octa-3-yl chlorocarbonate hydrochloride (231 mg) synthesized from triphosgene, followed by stirring at room temperature for 30 minutes, and then stirring at 80° C. for 15 hours. To the reaction mixture was added water, followed by extraction with EtOAc. The organic layer was washed with water and brine in this order, then dried over MgSO4, and concentrated under reduced pressure. The residue was purified by medium-pressure preparative liquid chromatography (silica gel, YAMAZEN YFLC WPrep2XY, CHCl3:MeOH) to obtain a colorless oily substance (135 mg). This was dissolved in EtOH, and fumaric acid (38 mg) was added thereto. The crystal precipitated was collected by filtration to obtain (3R)-1-azabicyclo[2.2.2]oct-3-yl (2-phenyl-5,6-dihydro-4H-cyclopenta[b]thien-3-yl)carbamate fumarate (103 mg) as a white solid.

Provenance & Evidence