반응 #5206

반응 방정식

sodium bicarbonate

2-iodoethanol

sodium bicarbonate

(2S, 4S)-2-carbamoyl-4-(4-methoxybenzylthio)pyrrolidine

→

title compound

(2S, 4S)-2-Carbamoyl-1-(2-hydroxyethyl)-4-(4-methoxybenzylthio)pyrrolidine

용매

dimethylformamide

반응 조건

후처리

1. 1
   workup.WAITat 40° C. for 19 hours
2. 2
   추출extracted with ethyl acetate
3. 3
   세척The extract was washed with an aqueous solution of sodium chloride
4. 4
   건조dried over anhydrous magnesium sulfate
5. 5
   기타The solvent was then removed by distillation under reduced pressure

실험 절차

0.175 ml of 2-iodoethanol and 0.16 g of sodium bicarbonate were added, whilst ice-cooling, to a solution of 0.5 g of (2S, 4S)-2-carbamoyl-4-(4-methoxybenzylthio)pyrrolidine [prepared as described in Preparation 1-(5)] dissolved in 5 ml of dry dimethylformamide, and the mixture was stirred at the same temperature for 1 hour, at room temperature for 2.5 hours, and at 40° C. for 19 hours. The reaction mixture was then poured into a saturated aqueous solution of sodium bicarbonate and extracted with ethyl acetate. The extract was washed with an aqueous solution of sodium chloride and dried over anhydrous magnesium sulfate. The solvent was then removed by distillation under reduced pressure, and the residue was subject to column chromatography through silica gel (Wako Pure Chemicals, Ltd.; wako gel C-100). 0.465 g of the title compound was obtained as crystals from the fractions eluted with a 95:5 by volume mixture of ethyl acetate and methanol.

출처