Dimethylamine → 1-(4-(Diethoxymethyl)phenyl)-n,n,-dimethylmethanamine

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Reaction Steps

A mixture of 1-(4-(diethoxymethyl)benzaldehyde (2.08 g, 10 mmol) and dimethylamine (33% aqueous solution, 2.74 g, 20 mmol) in methanol (20 mL) was stirred at room temperature for 40 mins. The mixture was cooled to 0° C., sodium borohydride (0.57 g, 15 mmol) was added portionwise. After the addition, the mixture was stirred at room temperature for 4 hr. Methanol was removed under reduced pressure. The residue was partitioned between water (50 mL) and ethyl acetate (50 mL). The organic layer was separated. The aqueous layer was extracted with ethyl acetate (50 mL×3). The combined organic layers were washed with brine, dried over anhydrous sodium sulfate, and concentrated to give 1-(4-(diethoxymethyl)phenyl)-N,N-dimethylmethanamine (1.8 g) as a light yellow oil which was used in the next step without further purification. MS (ESI) m/z: 237 (M+1)+.

Provenance & Evidence