Ammonium Chloride → HCID 67105363, compound

Participants

Reaction Conditions

Reaction Steps

To a −15° C. solution of benzyl {(1S)-2-[methoxy(methyl)amino]-1-methyl-2-oxoethyl}carbamate (1.96 g, 7.36 mmol) in THF (9.4 mL) was added i-propyl magnesium chloride (3.6 mL of a 2M solution in Et2O, 7.2 mmol). The reaction was stirred at −15° C. for 15 minutes and then 3,5-difluorophenylmagnesium bromide (29.44 mL of a 0.5 M solution in THF, 14.72 mmol) was added. The reaction was warmed to room temperature and stirred for 24 hours. The reaction was then poured into saturated NH4Cl (100 mL) and extracted with EtOAc (3×100 mL). The organic extracts were washed with water and brine (100 mL each), dried over Na2SO4, filtered, and concentrated. Purification of the residue by flash chromatography on silica gel (15% EtOAc/hexanes) afforded benzyl [(1S)-2-(3,5-difluorophenyl)-1-methyl-2-oxoethyl]carbamate. Rf=0.34 (15% EtOAc/hexanes). LCMS=342.3 (M+Na)+.

Provenance & Evidence