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ChemicalBook CAS DataBase List Aspartame
22839-47-0

Aspartame synthesis

10synthesis methods
By coupling the amino acids L-phenylalanine and L-aspartic acid, and the esterification of the carboxyl group of the phenylalanine moiety to produce the methyl ester. This esterification can occur before or after coupling. The crystallized slurry is centrifuged and the resulting “wet-cake” is washed to remove impurities.
33605-76-4 Synthesis
FOR-ASP-PHE-OME

33605-76-4
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Yield:22839-47-0 83%

Reaction Conditions:

with hydroxylamine hydrochloride in methanol;

Steps:

5 EXAMPLE 5

EXAMPLE 5 1.6 g N-Formyl-α-L-aspartyl-L-phenylalanine methyl ester (5 millimole) and 1.74 g hydroxylamine hydrochloride (25 millimole) were dissolved in 8 ml methanol, and the solution was stirred ten hours at 50° C. It then contained α-L-aspartyl-L-phenylalanine methyl ester in a yield of 83%.

References:

US4021418,1977,A

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