Methanamine, N-methoxy-, hydrochloride (1:1) → Tert-butyl 3-[methoxy(methyl)carbamoyl]pyrrolidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of 1-(tert-butoxycarbonyl)pyrrolidine-3-carboxylic acid (5.0 g, 23 mmol), O,N-dimethylhydroxylamine hydrochloride (4.51 g, 46.5 mmol), DIPEA (9.00 g, 69.6 mmol), and HATU (17.6 g, 46.5 mmol) in DMF (50 mL) was stirred at 15° C. for 16 h. DMF was removed, the residue was extracted with ethyl acetate, washed with brine, dried over MgSO4, filtered, and evaporated to give the crude product, which was purified by silica gel chromatography eluting with a 0-30% gradient of EtOAc in petroleum ether to afford tert-butyl 3-(N-methoxy-N-methylcarbamoyl)pyrrolidine-1-carboxylate (6.3 g, 90% yield) as pale yellow oil. LCMS (ESI) m/z: 203.2 [M-56+H+].

Provenance & Evidence