反应详情

To a solution of tert-butyl 4-[({[(2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]oct-2-yl]carbonyl}amino)oxy]piperidine-1-carboxylate 27 (0.5 g, 1.05 mml) in methanol (30 mL) was added 5% Pd/C (0.5 g). The mixture was hydrogenated under 35 psi hydrogen atmosphere at room temperature for 1 h. The catalyst was filtered out through Celite, and the filtrate was evaporated to give tert-butyl 4-[({[(2S,5R)-6-hydroxy-7-oxo-1,6-diazabicyclo[3.2.1]oct-2-yl]carbonyl}amino)oxy]piperidine-1-carboxylate 28 (0.395 g, 98%) as a colorless foam.

1. filtrationThe catalyst was filtered out through Celite
2. customthe filtrate was evaporated