Formaldehyde → Methyl 4-(1-diphenylmethoxycarbonyl-2-hydroxyethyl)-2,3,5,6-tetrafluorobenzoate

Participants

Reaction Steps

In 486 ml of N,N-dimethylformamide was dissolved 8.6 g of methyl 4-diphenylmethoxycarbonylmethyl-2,3,5,6tetrafluorobenzoate. To the resulting solution were added 3.54 g of paraformaldehyde and 61 mg of sodium methylate in this order. The resulting mixture was stirred at room temperature for 2 hours. To the reaction mixture were added 300 ml of ethyl acetate and 800 ml of water in this order. The organic layer was separated, washed with water and a saturated aqueous sodium chloride solution in this order, and dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure. The residue obtained was purified by a column chromatography (eluant: toluene/ethyl acetate=10/1) to obtain 35.0 g (yield: 67.0%) of methyl 4-(1-diphenylmethoxycarbonyl-2-hydroxyethyl)-2,3,5,6-tetrafluorobenzoate.

Provenance & Evidence