Triethylamine → Methyl 3-oxo-2-(pivalamido)butanoate

Participants

Reaction Steps

A solution of methyl 2-amino-3-oxobutanoate hydrochloride (0.50 g, 3.0 mmol) in CH2Cl2 (30 mL) was cooled in an ice bath. Pivaloyl chloride (0.37 mL, 3.0 mmol) and triethylamine (0.84 mL, 6.0 mmol) were slowly added, and the reaction was allowed to slowly warm to room temperature overnight. The reaction was washed with water, dried over Na2SO4, and concentrated under vacuum. The residue was purified by silica gel chromatography (0%-3% MeOH—CH2Cl2) to obtain methyl 3-oxo-2-(pivalamido)butanoate (0.48 g, 74% yield). 1H NMR (400 MHz, CDCl3) δ 6.82 (bs, 1H), 5.21 (d, J=6.1 Hz, 1H), 3.82 (s, 3H), 2.39 (s, 3H), 1.24 (s, 9H) ppm. LC/MS: m/z 216.5 (M+H)+ at 1.98 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Provenance & Evidence