反应详情

To a stirred solution of 3-(naphthalen-1-yl)propanal (2.3 g, 12.5 mmol) in DMF (6 mL) under nitrogen is added dibenzyl phosphite (3.3 g, 12.5 mmol), followed by potassium fluoride (0.94 g, 16.2 mmol). After 2 hours, the stirred suspension is diluted with ethyl acetate (60 mL) and washed with water (3×20 mL). The organic layer is dried over anhydrous MgSO4, filtered and concentrated in vacuo. The residue is purified by flash-chromatography on silica gel, eluting with a gradient of ethyl acetate in hexane (30% to 40% ). Concentration of the pure fractions in vacuo yields [1-hydroxy-3-(naphthalen-1-yl)-propyl]phosphonic acid dibenzyl ester as an oil which solidifies on standing.

1. washwashed with water (3×20 mL)
2. dry with materialThe organic layer is dried over anhydrous MgSO4
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe residue is purified by flash-chromatography on silica gel
6. washeluting with a gradient of ethyl acetate in hexane (30% to 40% )