反应详情

A solution of 4 (533 mg, 2.18 mmol) in ether (10 mL) was treated with 5% aqueous HCl (20 mL). The mixture was stirred at room temperature (11 d). The reaction was diluted with ether and neutralized with sodium bicarbonate solution. The aqueous layer was extracted with two additional portions of ether and the combined organic extracts were washed with brine, dried over Na2SO4, and concentrated under reduced pressure. PCTLC (SiO2, 4 mm, 20% EtOAc-80% hexane) afforded the title compound (5).

1. extractionThe aqueous layer was extracted with two additional portions of ether
2. washthe combined organic extracts were washed with brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated under reduced pressure