1-Bromo-3,5-bis(trifluoromethyl)benzene → 3',5'-Bis(trifluoromethyl)-2-aminobenzophenone

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Reaction Conditions

Reaction Steps

Then, in a nitrogen atmosphere, N-methoxy-N-methyl-anthranilamide (0.62 g, 3.4 mmol), and 3,5-bis(trifluoromethyl)-1-bromobenzene (1.00 g, 3.4 mmol) were dissolved in tetrahydrofuran (20 mL), followed by stirring at −78° C. To the solution, 1.66 mol/L n-butyl lithium (4.11 mL, 6.8 mmol) was gradually added dropwise, followed by stirring for 30 minutes. The reaction was terminated by adding 1 mol/L hydrochloric acid. The reaction solution was extracted with ethyl acetate. The organic layer was washed with a sodium chloride solution and then dried with magnesium sulfate, followed by filtration. The filtrate was concentrated using a rotary evaporator. The residue was purified by recrystallization (hexane). Thus, 3′,5′-bis(trifluoromethyl)-2-aminobenzophenone (1.1 g, 3.3 mmol) was obtained in a yield of 96%.

Provenance & Evidence