Oxamic Acid → HCID 86701011, compound

Participants

Reaction Conditions

Reaction Steps

HATU (0.95 g, 2.5 mmol) was added to a 0° C. solution of (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carbohydrazide (1.00 g, 2.5 mmol), 2-amino-2-oxoacetic acid (0.18 g, 2.1 mmol) and DIPEA (1.08 g, 8.4 mmol) in DMF (10 mL). The reaction mixture was stirred at 0° C. for 1 h then quenched with saturated sodium chloride (50 mL) and the organic layer was separated. The aqueous layer was exacted with EtOAc (3×). The combined organic layer was washed with saturated sodium chloride (2×), dried over Na2SO4, and concentrated. The residue was purified by silica gel column chromatography (1:1 EtOAc/hexane) to give 2-(2-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carbonyl)hydrazinyl)-2-oxoacetamide (0.57 g, 64%). ESI-MS (EI+, m/z): 362 [M+H]+.

Provenance & Evidence