Reaktion #1462170

Reaktionsgleichung

(2-methoxyethoxy)methyl chloride

(2R)-4-benzyl-1-[3,5-bis(trifluoromethyl)benzoyl]-2-(3-hydroxy-4-methylbenzyl)piperazine

Sodium hydride

water

→

(2R)-4-benzyl-1-[3,5-bis(trifluoromethyl)benzoyl]-2-[3-[(2-methoxyethoxy)methoxy]-4-methylbenzyl]piperazine

Lösungsmittel

N,N-dimethylformamide

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe whole was stirred at room temperature for 2.5 hours
2. 2
   ExtraktionThe whole was extracted with ethyl acetate
3. 3
   TrocknenThe extract was dried over magnesium sulfate
4. 4
   Sonstigeevaporated under reduced pressure
5. 5
   SonstigeThe residue was purified by column chromatography on silica gel using
6. 6
   workup.ADDITIONmixed solvents of hexane and ethyl acetate (7:3)
7. 7
   workup.ADDITIONThe fractions containing the objective compound
8. 8
   Sonstigewere collected
9. 9
   Sonstigeevaporated under reduced pressure

Vorschrift

Sodium hydride (60% in mineral oil, 18 mg) was added by small portions to an ice-cooled solution of (2R)-4-benzyl-1-[3,5-bis(trifluoromethyl)benzoyl]-2-(3-hydroxy-4-methylbenzyl)piperazine (0.20 g) in N,N-dimethylformamide (2 ml) below 5° C. under nitrogen atmosphere. After the mixture was stirred for 5 minutes, (2-methoxyethoxy)methyl chloride (0.064 ml) was added to the mixture. The whole was stirred at room temperature for 2.5 hours, and thereto water was added. The whole was extracted with ethyl acetate. The extract was dried over magnesium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel using mixed solvents of hexane and ethyl acetate (7:3). The fractions containing the objective compound were collected and evaporated under reduced pressure to give (2R)-4-benzyl-1-[3,5-bis(trifluoromethyl)benzoyl]-2-[3-[(2-methoxyethoxy)methoxy]-4-methylbenzyl]piperazine (0.21 g) as an oil.

Quelle