Reaktion #160763

Reaktionsgleichung

tert-butyl 5-(3-nitropyridin-4-yl)-2-oxo-3a,6,7,7a-tetrahydrobenzo[d]oxazole-3(2H)-carboxylate

→

tert-butyl 5-(3-aminopyridin-4-yl)-2-oxohexahydrobenzo[d]oxazole-3(2H)-carboxylate

Ausbeute 87.0%

Lösungsmittel

methanol

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe solid was removed by filtration
2. 2
   EinengenThe filtrate was concentrated under reduced pressure

Vorschrift

To a solution of tert-butyl 5-(3-nitropyridin-4-yl)-2-oxo-3a,6,7,7a-tetrahydrobenzo[d]oxazole-3(2H)-carboxylate (1.0 equiv.) in methanol and ethyl acetate (1; 1, 0.1M) was added Pd/C (10%). The resulting mixture was stirred under H2 atmosphere for 6 hours. The solid was removed by filtration. The filtrate was concentrated under reduced pressure to give tert-butyl 5-(3-aminopyridin-4-yl)-2-oxohexahydrobenzo[d]oxazole-3(2H)-carboxylate (87%), which was used in the next step without further purification. LC/MS (m/z): MH+=334.1, Rt=0.51.

Quelle