To a solution of 2-(2,6-dichlorophenyl)-2-((triethylsilyl)oxy)ethanamine (248 mg, 0.774 mmol) in DCM (2581 μl) was added spiro[2.5]octane-6-carbaldehyde (107 mg, 0.774 mmol), AcOH (35.5 μl, 0.619 mmol) and NaBH(OAc)3 (246 mg, 1.161 mmol). The slurry mixture was stirred at room temperature for overnight. The mixture was quenched with 0.5 M NaOH and mixture was stirred at rt for 30 min. Evolution of gas was observed. The layers were separated. The organic layer was dried over Na2SO4 and concentrated. The residue was purified by silica gel column chromatography eluting with a gradient of 0% to 100% EtOAc in hexane to give 2-(2,6-dichlorophenyl)-N-(spiro[2.5]octan-6-ylmethyl)-2-((triethylsilyl)oxy)ethanamine
