Reaktion #54819

Reaktionsgleichung

1-[2-hydroxy-2-(2-naphthyl)ethyl]imidazole

benzoyl chloride

→

1-[2-benzoyloxy-2(2-naphthyl)ethyl]imidazole

Lösungsmittel

pyridine

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONThe resulting solution is poured into 100 ml
2. 2
   Extraktionwater, extracted with ethyl acetate
3. 3
   Waschenthe extracts washed
4. 4
   Trocknendried (MgSO4)
5. 5
   Sonstigeevaporated in vacuo
6. 6
   Sonstigeto remove residual pyridine

Vorschrift

A solution of 1.19 g. 1-[2-hydroxy-2-(2-naphthyl)ethyl]imidazole in 20 ml. of pyridine is treated dropwise with stirring with 0.72 ml. of benzoyl chloride and the mixture stirred overnight. The resulting solution is poured into 100 ml. water, extracted with ethyl acetate and the extracts washed, dried (MgSO4) and evaporated in vacuo to remove residual pyridine and afford 1-[2-benzoyloxy-2(2-naphthyl)ethyl]imidazole. The residue is dissolved in ether, treated with ethereal hydrogen chloride and the resulting precipitate recrystallized from acetone/methanol to give 1.3 g. of hydrochloride salt, m.p. 219°-219.5° C.

Quelle