Acetic-formic anhydride → HCID 11245009, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (2R,3S)-2-(3-phenyl-1-propyl)-3-(2-tetrahydropyranyloxyamino)butanoic acid (21.4 g, 66.7 mmol) in pyridine (100 mL) at 0° C. is added formic acetic anhydride (30 mL). The resulting solution is allowed to warm to 25° C., stirred for 6 h, and then concentrated to dryness under reduced pressure. The resulting gum is dissolved in EtOAc (300 mL) and washed sequentially with 1 N hydrochloric acid (200 mL) and saturated aqueous sodium chloride solution. The organic layer is dried over anhydrous magnesium sulfate and concentrated under reduced pressure providing (2R,3S)-2-(3-phenyl-1-propyl)-3-(formyl-2-tetrahydropyranyloxyamino)butanoic acid as an oil (18.9 g, 81% yield). ESI-MS m/z 372 (M+Na)+348 (M−1)31 .

Provenance & Evidence