Hydrochloric Acid → HCID 57457957, compound

Participants

Reaction Steps

2.01 ml (18.7 mmol) of methyl malonyl chloride were added dropwise to a stirred, ice-cooled mixture of a solution of 2.43 g (17.0 mmol) of (2S)-2-(1-carboxyethyl)pyrrolidine [prepared as described in Tetrahedron Lett., 40, 2891–2894 (1999)] in 60 ml of dichloromethane and 2.61 ml (18.7 mmol) of triethylamine. After stirring the resulting mixture at the same temperature for 15 minutes and then at room temperature for 30 minutes, a saturated aqueous solution of sodium hydrogencarbonate was added. Subsequently, the resulting mixture was adjusted to pH 2 with concentrated hydrochloric acid and then extracted with a 4:1 by volume mixture of dichloromethane and isopropanol. The organic extract was washed with water, dried over anhydrous magnesium sulfate and then concentrated by evaporation under reduced pressure to afford 4.47 g (yield: quantitative) of the title compound as a pale brown oil.

Provenance & Evidence