反应详情

(iv)(a) A solution of 130 mg (0.35 mmol) of β(R)-benzyloxy-α(RS)-phenyl-1,4-dioxaspiro[4,5]decane-2(R)-ethanol in 3 ml of acetic acid was hydrogenated over 10% palladium-on-carbon under a pressure of about 4.1 atmospheres for 2 days. The catalyst was removed by filtration and the filtrate was evaporated. The crude product was purified by flash chromatography on silica gel using 2% methanol in dichloromethane for the elution. There were obtained 60 mg of α(R)-benzyl-1,4-dioxaspiro[4,5]decane-2(R)-methanol in the form of a colourless oil; MS: m/e 262 [M]+.

1. customThe catalyst was removed by filtration
2. customthe filtrate was evaporated
3. customThe crude product was purified by flash chromatography on silica gel using 2% methanol in dichloromethane for the elution