Reaktion #1356960

Reaktionsgleichung

acetic anhydride

pyridine

3-nitro-o-cresol

methanol

→

3-(acetylamino)-2-methylphenyl acetate

Ausbeute 94.0%

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeAfter completion of the reaction
2. 2
   Filtrationthe catalyst was filtered off
3. 3
   Einengenthe filtrate was concentrated under reduced pressure
4. 4
   workup.DISSOLUTIONThe resulting residue was dissolved in ethyl acetate
5. 5
   workup.ADDITIONby adding
6. 6
   SonstigeAfter completion of the reaction
7. 7
   Einengenthe reaction mixture was concentrated
8. 8
   workup.ADDITIONhexane was added
9. 9
   FiltrationThe resulting suspension was filtered
10. 10
    Sonstigethe precipitate was dried under reduced pressure

Vorschrift

Under a nitrogen atmosphere, 10% Pd—C (1.0 g) was added to a solution of 3-nitro-o-cresol (10.0 g, 65.3 mmol) in methanol (200 ml) at room temperature, and catalytic reduction was carried out at ordinary temperature and atmospheric pressure. After completion of the reaction, the catalyst was filtered off and the filtrate was concentrated under reduced pressure. The resulting residue was dissolved in ethyl acetate, followed by adding thereto acetic anhydride (10.0 ml, 170 mmol) and pyridine (10.6 ml, 131 mmol), and the resulting mixture was refluxed for 2 hours. After completion of the reaction, the reaction mixture was concentrated and hexane was added thereto. The resulting suspension was filtered and the precipitate was dried under reduced pressure to obtain 3-(acetylamino)-2-methylphenyl acetate (12.7 g, 94%).

Quelle