Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing alpha or beta amino acid or substituted amino acid...
Reexamination Certificate
2005-10-13
2009-12-15
Zucker, Paul A (Department: 1621)
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing alpha or beta amino acid or substituted amino acid...
C435S130000
Reexamination Certificate
active
07632664
ABSTRACT:
A method for producing 2-hydroxy-4-(methylthio)butyric acid which comprises the following steps (A), (B) and (C):Step (A): step of reacting 1,2-epoxy-3-butene with water to obtain 3-butene-1,2-diol,Step (B): step of reacting 3-butene-1,2-diol with methanethiol to obtain 4-(methylthio)butane-1,2-diol,Step (C): step of oxidizing 4-(methylthio)butane-1,2-diol to obtain 2-hydroxy-4-(methylthio)butyric acid.
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Asako Hiroyuki
Hagiya Koji
Foley & Lardner LLP
Sumitomo Chemical Company Limited
Zucker Paul A
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