3-Bromoanisole → 2-Dimethylaminomethyl-3-(3-methoxy-phenyl)-bicyclo[3.2.1]octan-3-ol

Participants

Reaction Conditions

Reaction Steps

Add dropwise a solution of t-BuLi (19.2 mL, 25.0 mmol) in hexane via syringe to a solution of 1-bromo-3-methoxy-benzene (3.74 g, 20.0 mmol) in THF (60 mL) at −78° C. under N2. After being stirred at −78° C. for 1 hour, add dropwise a solution of 2-dimethylaminomethyl-bicyclo[3.2.1]octan-3-one (1.81 g, 10.0 mmol) in THF (10 mL) to the reaction mixture and stir the resultant mixture at −78° C. for additional 1 hour. Quench the reaction with saturated aqueous NH4Cl solution (20 mL). Extract the aqueous mixture with EtOAc (50 mL×3). The combined organic layers are washed with brine (15 mL), dried over Na2SO4, filtered, and concentrated under vacuum. Purify the residue by silica gel chromatography (CH2Cl2:MeOH=30:1) to afford 2-dimethylaminomethyl-3-(3-methoxy-phenyl)-bicyclo[3.2.1]octan-3-ol as white solid (1.49 g, yield: 51%). MS (m/z): 290 (M+1).

Provenance & Evidence