反应详情

An aqueous solution of hydroxylamine (1.25 mL, 50% in water) was added to a stirred solution of 4-bromo-1-naphthalenecarboxaldehyde (3.7 g, 15.7 mmol, prepared from commercially available 1,4-dibromonaphthalene by the method described in European Journal of Organic Chemistry 2006, 10, 2329-2335) in ethanol (30 mL). After stirring at room temperature for 3 h, the reaction mixture was concentrated under reduced pressure to provide the title compound as a pale yellow solid (3.8 g). 1H NMR (Me2S(O)-d6): δ 11.60 (s, 1H), 8.81 (s, 1H), 8.71 (d, 1H), 8.24 (d, 1H), 7.95 (d, 1H), 7.74 (m, 3H).

1. concentrationthe reaction mixture was concentrated under reduced pressure