Methanamine, N-methoxy-, hydrochloride (1:1) → N-methoxy-N-methyl-3-[[(3-phenoxyphenyl)-(3,3,3-trifluoro-2-hydroxypropyl)amino]methyl]benzamide

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Reaction Conditions

Reaction Steps

EX-620A) To a slurry of methyl 3-[[(3-phenoxyphenyl)(3,3,3-trifluoro-2-hydroxypropyl)amino]methyl]benzoate (1.03 g, 0.0023 mol) and N,O-dimethyl-hydroxylamine hydrochloride (386 mg, 0.0040 mol) in 4.6 mL of tetrahydrofuran at −15° C. was added a 2.0 M solution of isopropylmagnesium chloride in THF (4.6 mL, 0.0092 mol) over 15 min. The reaction was stirred for 1 h at −15° C., then quenched with 20% aqueous ammonium chloride and extracted with ethyl acetate. The organic layers were dried over Na2SO4 and concentrated in vacuo. The crude product was purified by column chromatography on silica gel eluting with 1:1 ethyl acetate:hexane to afford 0.72 g (66%) of the desired N-methoxy-N-methyl-3-[[(3-phenoxyphenyl)-(3,3,3-trifluoro-2-hydroxypropyl)amino]methyl]benzamide product as an off-white solid. HRMS calcd. for C25H25N2O4F3: 475.1845 [M+H]+, found: 475.1840.

Provenance & Evidence