反应详情

A solution of N-(2-hydroxyethyl)phthalimide (Aldrich, 19-1, 6.36 g, 33 mmol) and DEAD (5.7 mL, 36 mmol) in 25 mL THF and 10 mL DMF was added to a solution of methyl 4-hydroxybenzoate (1-2, 5.00 g, 33 mmol) and Ph3P (9.53 g, 36 mmol) in 100 mL THF during 1 h. After an additional hour the reaction was diluted with ether, washed twice with water, then 1N NaOH and brine, dried (MgSO4), filtered and concentrated. Flash chromatography (silica gel, CH2Cl2) provided 19-2 as a white solid.

1. washwashed twice with water
2. dry with material1N NaOH and brine, dried (MgSO4)
3. filtrationfiltered
4. concentrationconcentrated