Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2006-11-28
2006-11-28
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S172000, C562S507000, C562S530000
Reexamination Certificate
active
07141695
ABSTRACT:
The invention relates to methods for producing substituted acrylic acid esters and to the use of the latter for producing substituted γ-amino acids, such as gabapentin and pregabalin. The substituted acrylic acid esters are produced by Wadsworth-Emmons olefination with trialkyl phosphonoacetate in the presence of alkali carbonate as the base, in an aqueous solvent.
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Przewosny Michael Thomas
Pütz Claudia
Grunenthal GmbH
Perman & Green LLP
Zucker Paul A.
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