Water → 2-Benzyloxy-5-(2-bromoacetyl)-N-[3,5-bis(trifluoromethyl)phenyl]benzamide

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Reaction Steps

5-Acetyl-2-benzyloxy-N-[3,5-bis(trifluoromethyl)phenyl]benzamide (compound of Example 58(3); 4.81 g, 10 mmol) was dissolved in tetrahydrofuran (30 ml). Phenyltrimethylammonium tribromide (3.75 g, 10 mmol) was added, and the mixture was stirred at room temperature for 12 hours. The reaction mixture was poured into water and extracted with ethyl acetate. After the organic layer was washed with aqueous sodium hydrogen sulfite, water and brine, dried over anhydrous magnesium sulfate, the residue obtained by evaporation under reduced pressure was purified by chromatography on silica gel (n-hexane:ethyl acetate=4:1), and recrystallized (ethyl acetate/n-hexane) to give the title compound (2.39 g, 42.7%) as a white solid.

Provenance & Evidence