Water → HCID 17861996, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of t-butyl 6-dimethylcarbamoyloxy-1-ethoxycarbonylmethyl-6-hydroxy-3,4-dihydro-1H-isoquinoline-2-carboxylate (1.97 g, 4.84 mmol) synthesized in step (e) of Example 187 in tetrahydrofuran (30 ml) was added lithium aluminum hydride (270 mg, 7.2 mmol) at −78° C., and the resulting mixture was stirred for 20 minutes at −78° C. and for 20 minutes at 0° C. successively under a nitrogen atmosphere. After stirring, to the reaction mixture were added water (0.3 ml), 15% aqueous sodium hydroxide solution (0.3 ml) and water (0.9 ml) in this order with stirring, and the resulting mixture was dried over anhydrous sodium sulfate, filtered, and evaporated in vacuo to afford the crude product. The crude product was purified by chromatography on a silica gel column using a mixed solvent of hexane and ethyl acetate (1:1-0:1) as the eluent to afford the title compound (1.38 g, yield: 78%) as a colorless oil.

Provenance & Evidence