反応 #5200

反応方程式

sodium chloride

ethyl iodide

sodium bicarbonate

(2S, 4S)-4-(4-methoxybenzylthio)-2-methylcarbamoylpyrrolidine

→

title compound

(2S, 4S)-1-Ethyl-4-(4-methoxybenzylthio)-2-methylcarbamoylpyrrolidine

溶媒

dimethylformamide

反応条件

後処理

1. 1
   workup.WAITat room temperature for 5 hours
2. 2
   抽出extracted with ethyl acetate
3. 3
   洗浄The extract was washed with an aqueous solution of sodium chloride
4. 4
   乾燥dried over anhydrous magnesium sulfate
5. 5
   その他after which the solvent was removed by distillation under reduced pressure
6. 6
   その他The residue was purified by column chromatography (eluted with ethyl acetate)

実験手順

0.71 ml of ethyl iodide and 742 mg of sodium bicarbonate were added to a solution of 2.25 g of (2S, 4S)-4-(4-methoxybenzylthio)-2-methylcarbamoylpyrrolidine dissolved in 20 ml of dry dimethylformamide, and the mixture was stirred at 0° to 5° C. for 1 hour and then at room temperature for 5 hours. At the end of this time, the reaction mixture was poured into an aqueous solution of sodium chloride and extracted with ethyl acetate. The extract was washed with an aqueous solution of sodium chloride and dried over anhydrous magnesium sulfate, after which the solvent was removed by distillation under reduced pressure. The residue was purified by column chromatography (eluted with ethyl acetate), to afford 1.87 g of the title compound as colorless crystals, melting at 68°-70° C.

出典