Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2005-05-10
2008-10-28
Zucker, Paul A (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
Reexamination Certificate
active
07442827
ABSTRACT:
The present invention provide a process that allows the industrially advantageous production of a cyclopentanone-2,3,5-tricarboxylic acid triester. Namely, the present invention provides a process for producing a cyclopentanone-2,3,5-tricarboxylic acid triester represented by the general formula (IV), characterized by comprising: (1) allowing an itaconic acid diester represented by the general formula (I) to react with a metal salt of malonic acid diester represented by the general formula (II) to obtain a reaction mixture containing an adduct represented by the general formula (III); and then (2) allowing said reaction mixture to react with an alcohol or a metal alkoxide, or a mixture thereof:wherein R1, R2, R3, R4, R5, R6, and R7each independently represents an alkyl group which may have a substituent, and M represents an alkali metal.
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Fukunaga Yoshimi
Sugioka Takashi
Buchanan & Ingersoll & Rooney PC
Kuraray Co. Ltd.
Zucker Paul A
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