2-Bromopropionic acid → HCID 53651654, compound

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Reaction Steps

Neutralize a solution of 1.4 g of methyl L-alaninate HCl and 3.1 g of α-bromopropionic acid in a dioxane-water mixture to pH 9 with sodium hydroxide. Warm to 70° and hold for 30 minutes, keeping the pH at 8 to 9 by addition of sodium hydroxide as necessary. Cool, apply to a column of Dowex 50 (H+) ion exchange resin, wash with water, and elute with 2% pyridine in water. Combine the product fractions and freeze dry. Purify this crude by chromatography on an ion-exchange column of Dowex 50 (Na+) in 0.5 M sodium citrate buffer pH 3.3. Collect the product fractions, concentrate to a small volume in vacuo, and repeat the Dowex 50 (H+) chromatography. Freeze dry the product fractions to obtain the pure N-(1-carbomethoxyethyl)-alanine.

Provenance & Evidence