Acetic Acid → 1-(5-bromo-4-methylpyridin-2-yl)-2,2,2-trifluoro-N-(4-methoxybenzylidene)ethanamine

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Reaction Conditions

Reaction Steps

A solution of 1-(5-bromo-4-methylpyridin-2-yl)-2,2,2-trifluoroethane-1,1-diol (163.1 mg; 0.5702 mmol) in 2.0 mL toluene was added at room temperature to a solution of 4-methoxybenzylamine (118 μL; 0.858 mmol) and acetic acid (49 μL; 0.854 mmol) in 2.0 mL toluene. A scoop of oven-dried 3A molecular sieves was added, and the reaction mixture heated at 110° C. for 3 days. The mixture was poured into saturated aqueous sodium bicarbonate and extracted twice with dichloromethane. The combined organic extracts were dried over magnesium sulfate, filtered, and concentrated. The crude product was purified via flash chromatography on silica gel (24 g silica, solvent gradient: 0-100% ethyl acetate in dichloromethane) to yield 164.2 mg of the title compound. LCMS (ESI): M-(4-methoxybenzaldehyde)+H=269.2; 1H NMR (400 MHz, DMSO) δ 8.69 (s, 1H), 8.57 (s, 1H), 7.80 (d, J=8.7 Hz, 2H), 7.66 (s, 1H), 7.05 (d, J=8.7 Hz, 2H), 5.28 (q, J=8.0 Hz, 1H), 3.82 (s, 3H), 2.41 (s, 3H).

Provenance & Evidence