Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2005-02-08
2005-02-08
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C548S232000
Reexamination Certificate
active
06852875
ABSTRACT:
Synthesis of N-[N-(3,3-dimethylbutyl)-L-α-aspartyl]-L-phenylalanine 1-methyl ester by treating N-(3,3-dimethylbutyl)-L-aspartic acid with ketones to give oxazolidinone derivatives, which are condensed with L-phenylalanine methyl ester.
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Burger et al, Regiospecific Reactions with Omega-Carboxy-Alpha-Amino Acids. A Simple Synthesis of Aspartame., Chemmiker Zeitlung 1990, 114(7-8), pp. 249-251.
Fitzpatrick ,Cella, Harper & Scinto
The Nutrasweet Co.
Zucker Paul A.
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