Water → HCID 86610732, compound

Participants

Reaction Steps

To a solution of 6-methoxy-1-(R)-(2-t-butyldimethylsilyloxyethyl)-3,4-dihydro-1H-isoquinoline-trifluoroacetamide (1.14 g, 2.73 mmol) obtained in step (a) of Example 190 in acetonitrile (10 ml) was added dropwise 48% solution of hydrofluoric acid in water (0.5 ml, 13.67 mmol) gradually with stirring under cooling in a water bath. The resulting mixture was further stirred at room temperature, and after confirming the disappearance of the starting material by thin layer chromatography, saturated aqueous sodium hydrogen carbonate solution was added with stirring, and the resulting mixture was extracted with ethyl acetate. The extract was washed with saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate and evaporated in vacuo. The residue obtained was purified by chromatography on a silica gel column using a mixed solvent of hexane and ethyl acetate (2:1) as the eluent to afford the title compound (0.65 g, yield: 79%) as a colorless oil.

Provenance & Evidence