Acetic Anhydride → 4'-Bromo-2'-(trifluoromethyl)acetanilide

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A solution of 2-amino-5-bromobenzotrifluoride (1.623 g, 6.76 mmol, Aldrich) in acetic anhydride (10 mL) was stirred at room temperature for 12 h to produce a white needle precipitate. It was filtered to give 1.840 g (99.7%) of title compound. Mp: 140°-2° C., 1HNMR (CDCl3): δ2.212 (s, 3H); 7.358 (s, 1H); 7.659 (d, 1H, J=8.7 Hz); 7.726 (d, 1H, J=1.8 Hz); 8.118 (d, 1H, J=8.4 Hz).

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