Reaktion #54509

Reaktionsgleichung

2-dodecyl-3-hydroxy-5-methyl-1,4-naphthoquinone

acetic anhydride

→

3-acetoxy-2-dodecyl-5-methyl-1,4-naphthoquinone

Lösungsmittel

pyridine

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe resulting mixture was evaporated under reduced pressure
2. 2
   Sonstigeto remove the pyridine
3. 3
   SonstigeThe residue was recrystallized from methanol

Vorschrift

3.8 Parts of 2-dodecyl-3-hydroxy-5-methyl-1,4-naphthoquinone, 8 parts of acetic anhydride and 32 parts of pyridine were stirred at room temperature for 16 hours. The resulting mixture was evaporated under reduced pressure to remove the pyridine. The residue was recrystallized from methanol to give 2.5 parts of 3-acetoxy-2-dodecyl-5-methyl-1,4-naphthoquinone, m.p. 69°-75° C.

Quelle