Method of producing .alpha.-l-aspartyl-l-phenylalanine...

Details Method of producing .alpha.-l-aspartyl-l-phenylalanine... Method of producing .alpha.-l-aspartyl-l-phenylalanine...

C - Chemistry, Metallurgy

07

C

530/5.06

C07C 103/52 (1980.01)

Patent

CA 1179329

ABSTRACT OF THE DISCLOSURE A method for preparing an .alpha.-L-aspartyl-L-phenylalanine alkyl ester, which method comprises: reacting a divalent alkali salt of aspartic acid, having an amino-protective group, with an organic halo ester compound, to form a monovalent, alkali-salt, mixed-anhydride aspartate compound; and condensing the mixed-anhydride aspartate compound with an alkyl ester of L-phenylalanine under alkaline conditions and reducing the pH to an acidic condition after condensation to free the amino and carboxyl groups, to form a mixture consist- ing essentially of the alpha and beta alkyl ester of L-aspartyl-L-phenylalanine.

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