Reaktion #552140

Reaktionsgleichung

carbonyl diimidazole

5-oxo-1-(phenylmethyl)-3-pyrrolidinecarboxylic acid

2,2,2-triflouroethylamine hydrochloride

1,8-diazabicyclo[5.4.0]undec-7-ene

→

5-oxo-1-(phenylmethyl)-N-(2,2,2-trifluoroethyl)-3-pyrrolidinecarboxamide

Ausbeute 28.3%

Lösungsmittel

tetrahydrofuran

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITat room temperature for 30 minutes
2. 2
   workup.STIRRINGThe reaction was stirred at room temperature overnight
3. 3
   SonstigeThe solvent was removed at reduced pressure
4. 4
   Waschenwashed with 3×150 ml saturated sodium bicarbonate
5. 5
   TrocknenThe organic layer was dried over magnesium sulfate
6. 6
   Sonstigethe solvent removed under reduced pressure
7. 7
   SonstigeThe product was purified by column chromatography on silica with ethyl acetate

Vorschrift

A mixture of 21.9 g (0.100 mole) 5-oxo-1-(phenylmethyl)-3-pyrrolidinecarboxylic acid in 150 ml tetrahydrofuran, was cooled to 0° C. in an ice bath under nitrogen and 24.32 g (0.150 mole) carbonyl diimidazole was added. The reaction was stirred at 0° C. for 30 minutes, then at room temperature for 30 minutes. A solution of 13.55 g (0.100 mole) of 2,2,2-triflouroethylamine hydrochloride, 15.22 g (0.100 mole) 1,8-diazabicyclo[5.4.0]undec-7-ene and 100 ml tetrahydrofuran was added. The reaction was stirred at room temperature overnight. The solvent was removed at reduced pressure. The residue was taken up in dichloromethane and washed with 3×150 ml saturated sodium bicarbonate. The organic layer was dried over magnesium sulfate and the solvent removed under reduced pressure. The product was purified by column chromatography on silica with ethyl acetate to give 8.50 g of 5-oxo-1-(phenylmethyl)-N-(2,2,2-trifluoroethyl)-3-pyrrolidinecarboxamide, mp 110°-112° C.

Quelle