反应详情

Trifluoroacetic acid (38.9 mL, 0.505 mmol) was added to a solution of the product of step B (1.03 g, 5.05 mmol) and methyl (2E)-3-(4-fluorophenyl)prop-2-enoate (1.00 g, 5.05 mmol) in methylene chloride (10 mL) at ambient temperature. After 18 h, the reaction mixture was poured into saturated aqueous sodium bicarbonate and extracted three times with methylene chloride. The combined organic extracts were washed with brine, dried (Na2SO4) and concentrated in vacuo. Purification of the crude residue by medium pressure liquid chromatography on silica gel (gradient elution; 0–9% methanol (containing 10% v/v ammonium hydroxide)/methylene chloride as eluent) furnished the title compound as a colorless liquid (1.06 g).

1. extractionextracted three times with methylene chloride
2. washThe combined organic extracts were washed with brine
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated in vacuo
5. customPurification of the crude residue by medium pressure liquid chromatography on silica gel (gradient elution; 0–9% methanol (containing 10% v/v ammonium hydroxide)/methylene chloride as eluent)