Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing heterocyclic carbon compound having only o – n – s,...
Reexamination Certificate
2005-06-21
2005-06-21
Lilling, Herbert J. (Department: 1651)
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing heterocyclic carbon compound having only o, n, s,...
C435S117000, C435S280000
Reexamination Certificate
active
06908752
ABSTRACT:
The present invention relates to a process for the preparation of the enantiomeric forms of 2-substituted 2-(2,5-dioxoimidazolidin-1-yl)acetic acid derivatives of the formula I,wherein R1, R2and R3have the meanings given in the claims, by stereodifferentiating conversion of mixtures of the enantiomers with the aid of enzymes.
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Aventis Pharma Deutschland GmbH
Lilling Herbert J.
Wang George
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