Hydrochloric Acid → N-benzoyl-L-alanine

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To a solution of sodium hydroxide (8.98 g, 224.49 mmol) in water (112.25 mL), was added at rt DL-Alanine (10 g, 112.25 mmol). The resulting solution was heated at 75° C. and the benzoyl chloride (15.77 g, 112.25 mmol) was slowly added. The reaction was heated for 30 minutes, and cooled down to 0° C. with an ice bath. Conc. HCl was added to adjust the pH to 1, then the white solid was filtrated through a fritted glass funnel and vacuum dried with P2O5 overnight. No purification was needed. This gave N-benzoylalanine (19.6 g, 90.4% yield) as white solid. 1H NMR (DMSO-d6) δ 12.61 (s br, 1H), 8.64 (d, 1H), 7.87-7.85 (m, 2H), 7.52-7.43 (m, 3H), 4.40 (q, 1H), 1.39 (d, 3H).

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