Reaktion #437754

Reaktionsgleichung

methyl 2-acetylamino-4-nitrobenzoate

→

methyl 2-acetylamino-4-aminobenzoate

Ausbeute 90.0%

Lösungsmittel

MeOH

Reaktionsbedingungen

Aufarbeitung

1. 1
   FiltrationThe catalyst was filtered off
2. 2
   Sonstigethe mixture was evaporated
3. 3
   SonstigeThe resulting crude solid was recrystallized with CHCl3-MeOH-hexane

Vorschrift

To a solution of methyl 2-acetylamino-4-nitrobenzoate (1.31 g, 5.50 mmol) in MeOH (30 mL) was added 5% Pd on carbon (195 mg), and the stirring under H2 gas (3 atm) was continued for 18 hours at rt. The catalyst was filtered off and the mixture was evaporated. The resulting crude solid was recrystallized with CHCl3-MeOH-hexane to give methyl 2-acetylamino-4-aminobenzoate (1.03 g, 90%) as a white solid. 1H-NMR (400 MHz, CDCl3) δ 2.23 (s, 3 H), 3.82 (s, 3H), 4.20 (s, 2 H), 6.30 (dd, J=2.5 Hz, 8.8 Hz, 1 H), 7.80 (d, J=8.8 Hz, 1 H), 8.06 (s, 1 H), 11.26 (s, 1 H); MS (FAB), m/z 208 (M+).

Quelle