Benzaldehyde → 4-(2-(Benzylamino)ethyl)phenol

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Reaction Steps

Combine tyramine (3.0 g, 3.3 mmol), benzaldehyde (3.0, 2.2 mmol), 3 Å molecular sieves (5 g), and ethanol (3 mL) and stir overnight at room temperature. Filter off the sieves then add sodium borohydride (2.5 g) to the reaction at 0° C. then stirred at room temperature overnight. Concentrate on a rotary evaporator, take up residue in water, and then extract with dichloromethane (3×100 mL). Dry the dichloromethane extracts over sodium chloride/magnesium sulfate, filter, then concentrate on a rotary evaporator to yield 4.3 g of the crude product. The crude product is purified by flash column chromatography on silica gel eluting with 10% cone ammonium hydroxide in ethanol and chloroform to yield 4-(2-benzylamino-ethyl)-phenol (2.6 g): 1H NMR (DMSO-D6, 300.00 MHz): 9.17 (s, 1H), 7.31 (m, 5H), 6.99 (d, 2H, J=8.4 Hz), 6.67 (d, 2H, J=8.8 Hz), 3.70 (s, 2H), 2.64 (m, 4H), 2.11 (s, 1H).

Provenance & Evidence