Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2011-03-01
2011-03-01
Chandrakumar, Nizal S (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S174000, C568S347000, C568S379000
Reexamination Certificate
active
07897802
ABSTRACT:
A substituted cyclopentanone represented by the following formula (2):(wherein R3and R4represent a substituent having 1 to 8 carbon atoms, may be the same as R1and R2, respectively, and may be the same as each other) can be produced by hydrogenating the double bond in a compound represented by the following formula (1):(wherein R1and R2represent a substituent having 1 to 8 carbon atoms) in the presence of a transition metal catalyst by using a carboxylic acid or a specific concentration of a carboxylic acid ester as a solvent. This process can produce a substituted cyclopentanone which is useful as a jasmine fragrance, an intermediate thereof or the like, in a simple and inexpensive manner at a high cis-isomer ratio.
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Matsushita Fumio
Shimizu Katsuya
Asahi Kasei Chemicals Corporation
Chandrakumar Nizal S
Staas & Halsey , LLP
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