Hydroxyamine hydrochloride → HCID 73067175, compound

Participants

Reaction Steps

5-(3-Isopropoxy-phenyl)-2,4-dimethyl-2-aza-bicyclo[3.3.1]nonan-7-one (2.2) (3.11 g, 13.0 mmole) and hydroxylamine hydrochloride (4.50 g, 64.8 mmol) in EtOH (absolute, 195 mL) were heated to reflux for 3 h. The reaction mixture was allowed to cool to room temperature and the ethanol was removed under reduced pressure. The crude oil was dissolved in 2 N NaOH (100 mL) and extracted with 3:1 CH2Cl2/THF (4×50 mL). The combined organic layers were dried (Na2SO4), filtered, and concentrated under reduced pressure yielding crude product. The crude product was purified by flash chromatography (neutral alumina, Brockman activity II-III) eluting with 9:1 ethyl acetate:hexane to afford the title compound (3.6 g, 88%) as an off white solid. 1H NMR (CDCl3) δ 8.47 (br, 1H), 7.23 (t, J=7.8 Hz, 1H), 7.00-6.72 (m, 3H), 4.54 (m, 1H), 3.63 (d, J=17 Hz, 1H), 3.29 (br, 1H), 2.94-2.85 (m, 2H), 2.51 (d, J=15.9 Hz, 1H), 2.44-2.40 (m, 4H), 2.05-1.87 (m, 5H), 1.33 (d, J=6.0 Hz, 6H), 0.76 (d, J=6.9 Hz, 3H).

Provenance & Evidence