Water → N~1~-[2-(3,5-Dimethoxyphenyl)ethyl]-N~1~-methylbutane-1,4-diamine

Participants

Reaction Steps

10.0 g of N-methyl-(2-(3,5-dimethoxyphenyl)ethyl)amine was dissolved in 130 ml of N,N-dimethylformamide, followed by the addition of 10.63 g of anhydrous potassium carbonate and 6.12 ml of 4-bromobutyronitrile. The reaction was carried out at a room temperature for 12 hours. Water was added to the reaction mixture. The obtained mixture was extracted with ethyl acetate. The ethyl acetate phase was washed with water and a saturated aqueous solution of common salt successively, dried over anhydrous potassium carbonate and distilled to remove the solvent. 150 ml of ethanol, 11 ml of concentrated hydrochloric acid and 1 g of platinum oxide were added to the obtained residue to carry out hydrogenation at a room temperature under 3 kg/cm2 for 12 hours. The catalyst was filtered out and the filtrate was concentrated under a reduced pressure, followed by the addition of concentrated aqueous ammonia. The obtained mixture was extracted with chloroform. The chloroform phase was dried over anhydrous potassium carbonate. After the solvent had been distilled off, the residue was distilled under a reduced pressure to obtain 10.85 g of the title compound as a colorless oil (yield: 80%).

Provenance & Evidence