Ethanol → HCID 21967811, compound

Participants

Reaction Steps

Ethyl (S)-(2-amino-1,2,3,4-tetrahydronaphthalen-7-yl-oxy)acetate (1.14 g) was dissolved in N,N-dimethylformamide (15 ml), and 2-bromo-4'-((2RS)-2-tetrahydropyranyloxy)-acetophenone (600 mg) was added to the solution under ice-cooling with stirring, followed by reaction at room temperature for an hour. Sodium borohydride (380 mg) and ethanol (10 ml) were added to the reaction mixture under ice-cooling with stirring. After reaction for an hour, the reaction mixture was poured into ice-water and extracted with ethyl acetate. The extract was washed with water and dried over anhydrous magnesium sulfate, and the solvent was removed in vacuo. The resulting residue was dissolved in tetrahydrofuran (20 ml), triethanolamine (2 ml) was added to the solution and the mixture was heated under reflux for 17 hours. After cooling, water was poured into the reaction mixture and the resulting mixture was extracted with ethyl acetate. The extract was washed with water and dried over anhydrous magnesium sulfate, and the solvent was removed in vacuo. Purification of the residue by medium pressure liquid column chromatography on silica gel (eluent: ethyl acetate) gave ethyl 2-[(2S)-2-[[(2RS)-2-hydroxy-2-[4-((2RS)-2-tetrahydropyranyloxy)phenyl]ethyl]amino]-1,2,3,4-tetrahydronaphthalen-7-yloxy]acetate (780 mg) as an oil.

Provenance & Evidence