Dl-Phenylalanine → D-phenylalanine N-carbobenzoxy-D-aspartic acid

Beteiligte Stoffe

Reaktionsschritte

Eight grams of DL-phenylalanine and 1.2 g of sulfuric acid was suspended in 100 ml of water at 40° C. Ten grams of N-carbobenzoxy-D-aspartic acid was added to the solution over five hours, while this solution was continuously stirred. The resulting crystal was separated, washed with 10 ml of water and dried to give 5.2 g of a D-phenylalanine N-carbobenzoxy-D-aspartic acid. Analysis revealed that the optical purity of the D-phenylalnine was 98%.

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