Water → 6-Methoxy-1,2,3,4-tetrahydroisoquinoline

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Reaction Steps

In methanol (100 ml), 6-methoxy-3,4-dihydroisoquinoline (10.4 g) was dissolved. To the resulting solution, water (10 ml) and then sodium borohydride (6.10 g) were added. The resulting mixture was stirred at room temperature for 15 minutes. The reaction mixture was concentrated under reduced pressure. The residue was dissolved in dichloromethane, followed by washing with water. The organic layer thus separated was dried over anhydrous sodium sulfate and distilled under reduced pressure to remove the solvent. The residue was purified by chromatography on a silica gel column (dichloromethane˜dichloromethane:methanol=100:15), whereby the title compound (7.95 g, 76%) was obtained.

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