Реакция #54509

Уравнение реакции

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

acetic anhydride

→

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

Растворители

pyridine

Условия реакции

Обработка

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

Методика

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.

Источник