反应详情

Methyl 3-hydroxy-4-iodobenzoate (2.0 g, 7.2 mmol) is dissolved in DMF (25 ml) in a dry flask under nitrogen. Allyl bromide (0.65 ml, 7.55 mmol) is added drop-wise, followed by the careful addition of 60% NaH (303 mg, 7.55 mmol). The reaction is stirred overnight at RT and then is diluted with H2O (30 ml). The mixture is extracted with EtOAc (3×30 ml), and the combined organics are washed with 50% saturated NaCl (4×25 ml), dried (MgSO4), filtered, and concentrated under high vacuum to an oil that solidified upon standing. The volatiles are removed in vacuo to obtain 2.28 g (100%) of methyl 3-(allyloxy)-4-iodobenzoate as a tan solid. HRMS (FAB) calcd for C11H11IO3+H: 318.9833, found 318.9831 (M+H)+.

1. extractionThe mixture is extracted with EtOAc (3×30 ml)
2. washthe combined organics are washed with 50% saturated NaCl (4×25 ml)
3. dry with materialdried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated under high vacuum to an oil that
6. customThe volatiles are removed in vacuo