Ethyl Acetate → (4-Cyanomethoxynaphthalen-1-yl)-carbamic acid tert-butyl ester

Participants

Reaction Steps

N-tertbutyloxycarbonyl-4-amino-1-naphthol (1.0 g, 3.86 mmol), potassium carbonate (1.06 g, 7.7 mmol) and bromoacetonitrile (0.4 ml, 5.8 mmol) in anhydrous dimethylformamide (10 ml) are stirred at room temperature for 5 hours. The mixture is poured into ethyl acetate (100 ml) and washed with water (2×100 ml). The organic layer is then dried over anhydrous sodium sulfate and evaporated to dryness to give (4-cyanomethoxynaphthalen-1-yl)-carbamic acid tert-butyl ester as a red brown solid (1.132 g). 1H NMR 300 MHz (CDCl3) 8.2(d, 1H, J=11.5 Hz), 7.85(d, 1H, J=11.5 Hz), 7.55-7.75(m, 3H), 6.9(d, 1H, J=14 Hz), 6.62(s, 1H), 4.95(s, 2H), 1.5(s, 9H).

Provenance & Evidence