Hydroxyamine hydrochloride → (NE)-N-[(5-bromo-2-fluoro-3-methylphenyl)methylidene]hydroxylamine

To a stirred solution of 5-bromo-2-fluoro-3-methylbenzaldehyde (3.5 g, 16.2 mmol) in ethanol (50.0 mL) were added sodium acetate (2.0 g, 24.3 mmol) and hydroxylamine hydrochloride (1.69 g, 24.3 mmol) at ambient temperature. The reaction mixture was stirred at ambient temperature for 3 h. The reaction mixture was concentrated on rotavapour to obtain crude compound, which was washed with water filtered and dried under vacuum to afford the title compound as a white solid: mp 126-127° C.; 1H NMR (400 MHz, CDCl3) δ 8.32 (s, 1H), 7.73 (d, J=2.4 Hz, 1H), 7.51 (s, 1H), 7.34 (d, J=2.4 Hz, 1H), 2.25 (s, 3H); ESIMS m/z 232.10 ([M+H]+).

1. concentrationThe reaction mixture was concentrated on rotavapour
2. customto obtain crude compound, which
3. washwas washed with water
4. filtrationfiltered
5. customdried under vacuum

ORD-Eintrag

ord-0fd201ea242a449587cc08aff3d3f31a

Quelldatensatz

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09210927B2