Trifluoroacetic acid → tert-Butyl (3S)-3-[({[(2S,5R)-6-hydroxy-7-oxo-1,6-diazabicyclo[3.2.1]oct-2-yl]carbonyl}amino)oxy]pyrrolidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a mixture of tert-butyl {2-[({[(2S,5R)-7-oxo-6-(sulfooxy)-1,6-diazabicyclo[3.2.1]oct-2-yl]carbonyl}amino)oxy]ethyl}carbamate 44 (0.19 g, 0.45 mmol) in DCM (6.0 mL) was added trifluoroacetic acid (0.30 mL) at 0° C. The mixture was stirred at 0° C. for 1 h, concentrated and washed with ether. The white solid was collected by centrifugation. The crude product was purified by preparative HPLC to provide Compound 9 (Table 1) (44 mg) as a white solid.

Provenance & Evidence