1,2-Dichloroethane → HCID 59868529, compound

Participants

Reaction Steps

DIPEA (32.7 mL, 188 mmol) and EDC (15.4 g, 80.5 mmol) were added to a solution of (R)-3-t-butoxycarbonylamino-4-phenylbutyric acid (15.0 g, 53.7 mmol), HOBt (7.3 g, 53.7 mmol), and hydroxylamine hydrochloride (7.5 g, 107 mmol) in DMF (150 mL). The mixture was stirred at room temperature for 1 day and then concentrated in vacuo to yield a pale yellow oil. The oil was distributed between 5% THF in EtOAc and IM phosphoric acid. The organic layer was collected and washed with 1M NaOH. The alkaline aqueous layer was then acidified using 1M phosphoric acid and extracted with EtOAc. The organic layer was evaporated and the residue was purified by silica gel chromatography (0-100% EtOAc in hexanes) to afford the title compound as a white solid (1.0 g, 3.4 mmol). MS m/z: [M+H+] calcd for C15H22N2O4, 295.16. found 295.2.

Provenance & Evidence