反应详情

0.5 g (2.94 mmol) of 4-Fluoro-3-hydroxy-benzoic acid methyl ester was dissolved in 30 ml of anhydrous tetrahydrofuran. To this solution was added 0.506 g (3.23 mmol) of 2-(4-chloro-phenyl)-ethanol, 2.93 g (equivalent to 8.8 mmol PPh3) of triphenylphosphine derivatized polystyrene and 1.53 g (8.8 mmol) of DEAD. The solution was shaken for 16 h at RT. The polymer was filtered off and washed with tetrahydrofuran. The solvent was removed under reduced pressure. The residue was taken-up in ethyl acetate/n-heptane (1/5) and the insoluble residue was removed by filtration. The solvent was removed under reduced pressure. The residue was chromatographed on silica gel eluting with ethyl acetate/n-heptane (1/5).

1. filtrationThe polymer was filtered off
2. washwashed with tetrahydrofuran
3. customThe solvent was removed under reduced pressure
4. customthe insoluble residue was removed by filtration
5. customThe solvent was removed under reduced pressure
6. customThe residue was chromatographed on silica gel eluting with ethyl acetate/n-heptane (1/5)