Acetic Acid → N-[(2,5-Difluorophenyl)methylidene]hydroxylamine

Participants

Reaction Steps

2,5-Difluorobenzaldehyde (28.5 g, 0.20 mol) was dissolved in 30 ml EtOH. 80 ml water, 80 g crushed ice and hydroxylamine hydrochloride (15.3 g, 0.22 mol) were added. 250 ml (0.50 mol) 2N NaOH were added drop wise and the yellow solution was stirred for 3 hours at room temperature. The reaction mixture was neutralized to pH 6 with acetic acid. The formed suspension was diluted with water and filtered. The crystals were washed with water and dried 2 hours at 50° C. and <20 mbar to obtain the desired product as a white solid (26.1 g, 83%). MS (m/e): 156.0 (M−H+).

Provenance & Evidence