Hexane → 1-cycloheptyl-3-[(3R)-3-methoxy-1-azabicyclo[2.2.2]oct-3-yl]-1-phenyl-2-propyn-1-ol

Participants

Reaction Conditions

Reaction Steps

A 1.6 N solution of BuLi in hexane (41.7 ml, 66.7 mmol) was added dropwise to a solution of (3R)-3-ethynyl-1-azabicyclo[2.2.2]oct-3-yl methyl ether 53 (11 g, 66.7 mmol) in THF (100 ml) cooled at −5° C. After stirring for 10 minutes, the medium was cooled at −15° C., and a solution of cycloheptyl(phenyl)methanone 44 (14.2 g, 70.2 mmol) in THF (50 ml) was slowly added. The cooling bath was removed and the reaction was allowed to gradually warm to room temperature during 2 hours. The reaction was quenched by the addition of saturated aqueous NH4Cl solution. The reaction mixture was washed with brine, dried over Na2SO4 and evaporated. The yellowish oil was purified by chromatography over silica gel (CH2Cl2/EtOH/NH4OH 94/6/1). 1-cycloheptyl-3-[(3R)-3-methoxy-1-azabicyclo[2.2.2]oct-3-yl]-1-phenyl-2-propyn-1-ol 116 was obtained as a white solid (20.35 g, 83%, mixture of diastereomers).

Provenance & Evidence