反应详情

To a solution of (+/−)-tert-butyl 7-methyl-5-(3-nitropyridin-4-yl)-2-oxo-3a,6,7,7a-tetrahydrobenzo[d]oxazole-3(2H)-carboxylate (1.0 equiv.) in MeOH and ethyl acetate (1:1, 0.07 M) was added 10% Pd/C (0.1 equiv.) and the reaction was stirred at room temperature under an atmosphere of hydrogen. Upon completion of the reaction, the solution was filtered through a pad of Celite, washed with MeOH and ethyl acetate, the filtrate was concentrated to dryness under vacuo to give (+/−)-tert-butyl 5-(3-aminopyridin-4-yl)-7-methyl-2-oxohexahydrobenzo[d]oxazole-3(2H)-carboxylate as a mixture of diastereomers in >99% yield. LC/MS=348.2 (M+H), Rt=0.50 min.

1. customUpon completion of the reaction
2. filtrationthe solution was filtered through a pad of Celite
3. washwashed with MeOH and ethyl acetate
4. concentrationthe filtrate was concentrated to dryness under vacuo