Réaction #54509

Équation de réaction

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

acetic anhydride

→

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

Solvants

pyridine

Conditions de réaction

Traitement

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

Mode opératoire

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.

Source