Réaction #4220

Équation de réaction

2-(4-chlorophenoxy-methyl)-2-tert.-butyl-oxirane

1,2,4-triazole

ethyl acetate

→

2-(4-chlorophenoxy-methyl)-3,3-dimethyl-1-(1,2,4-triazol-1yl)butan-2-ol

Rendement 65.0%

Solvants

ethanol

Conditions de réaction

Traitement

1. 1
   ConcentrationThe mixture was then concentrated
2. 2
   Températurethe ethyl acetate mixture was heated
3. 3
   TempératureIt was then cooled in an ice bath
4. 4
   Filtrationthe solid was filtered off
5. 5
   Lavagerinsed with ethyl acetate
6. 6
   ConcentrationThe filtrate was concentrated
7. 7
   workup.DISSOLUTIONthe residue was dissolved in ether/hexane
8. 8
   FiltrationThe precipitate was filtered off
9. 9
   Lavagerinsed with ether
10. 10
    Autrethe free base was obtained

Mode opératoire

72.15 g (0.3 mole) of 2-(4-chlorophenoxy-methyl)-2-tert.-butyl-oxirane and 24.15 g (0.35 mole) of 1,2,4-triazole were heated under reflux in 120 ml of ethanol for 48 hours. The mixture was then concentrated, the residue was taken up in 200 ml of ethyl acetate and the ethyl acetate mixture was heated. It was then cooled in an ice bath and the solid was filtered off and rinsed with ethyl acetate. The filtrate was concentrated, the residue was dissolved in ether/hexane and the solution was gassed with hydrogen chloride. The precipitate was filtered off and rinsed with ether and the free base was obtained by adding ethyl acetate/1N sodium hydroxide solution. 60.2 g (65% of theory) of 2-(4-chlorophenoxy-methyl)-3,3-dimethyl-1-(1,2,4-triazol-1yl)butan-2-ol of melting point 84°-87° C. were obtained.

Source