Ethanol hydrochloride → ethyl (S)-3-(2-amino-1,2,3,4-tetrahydronaphthalen-7-yl)propionate

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Reaction Steps

Ethyl (S)-3-[2-(tert-butoxycarbonylamino)-1,2,3,4-tetrahydronaphthalen-7-yl]propionate (1.47 g) was dissolved in ethanol (21 ml), and 3 M hydrogen chloride ethanol solution (4 ml) was added to the solution at room temperature with stirring. After reaction for 20 hours, the reaction mixture was concentrated in vacuo. A saturated aqueous sodium bicarbonate solution (50 ml) and dichloromethane (10 ml) were added to the residue, and the resulting mixture was stirred for an hour at room temperature. Water was added to the reaction mixture, and the resulting mixture was extracted with dichloromethane. The extract was washed with water and dried over anhydrous magnesium sulfate. Removal of the solvent in vacuo gave ethyl (S)-3-(2-amino-1,2,3,4-tetrahydronaphthalen-7-yl)propionate (1.05 g) as an oil.

Provenance & Evidence