Hydroxyamine hydrochloride → HCID 136391022, compound

Participants

Reaction Steps

A solution of 1-[7-(bis{[2-(trimethylsilyl)ethoxy]methyl}amino)pyrazolo[1,5-a]pyrimidin-5-yl]ethanone (4.34 g, 9.94 mmol) in 1:1 EtOH/pyridine (50 mL) was treated with hydroxylamine hydrochloride (3.45 g, 49.7 mmol). The resulting mixture was stirred at room temperature for 1.5 h and then concentrated under reduced pressure to remove most solvent. The residue was partitioned between EtOAc (100 mL) and water (60 mL), the layers were separated, and the organic phase was washed with water (60 mL) and brine (20 mL), dried over Na2SO4 and concentrated under reduced pressure to give the title compound, 1-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)pyrazolo[1,5-a]pyrimidin-5-yl)ethanone oxime (4.90 g, 85% purity, 93% yield) as an off-white semisolid: MS (ESI+) for C20H37N5O3Si2 m/z 452 (M+H)+.

Provenance & Evidence