反应详情

A solution of KOH (1.73 g, 31 mmol) in water (50 mL) was added to a solution of compound 55 (10 g, 31 mmol) in ethyl acetate (100 mL). The aqueous layer stained in yellow. The mixture was stirred at room temperature for 1 h (TLC monitoring, eluent: CH2Cl2-ethyl acetate, 1:1). If necessary, additional portions of KOH solution (0.5 eq.) were added. The organic layer was separated, washed thoroughly with water, a solution of citric acid (to pH 7), again with water, dried over Na2SO4, and evaporated. Yield of 56: 6.6 g (93%) as a yellowish fluid oil.

1. customThe organic layer was separated
2. washwashed thoroughly with water
3. dry with materiala solution of citric acid (to pH 7), again with water, dried over Na2SO4
4. customevaporated