Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2011-03-08
2011-03-08
Witherspoon, Sikarl A (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
Reexamination Certificate
active
07902404
ABSTRACT:
Provided that a method for inexpensively producing optically active α-ionone with a high yield and a high asymmetric yield and with good workability in a short process, and a perfume composition comprising the optically active α-ionone obtained by the aforementioned method. A method for producing optically active α-ionone, comprising allowing α-ionone as a mixture of optical isomers to react with an esterification agent, and hydrolyzing the obtained α-ionone enol ester; a method for producing optically active α-ionone comprising subjecting α-ionone as a mixture of optical isomers to an asymmetric reduction, allowing the obtained optically active α-ionol to react with an esterification agent to give an optically active α-ionol ester, hydrolyzing the obtained optically active α-ionol ester after purification as necessary, and then oxidizing the obtained optically active α-ionol; and a perfume composition comprising thus obtained optically active α-ionone.
REFERENCES:
patent: 3940499 (1976-02-01), Pittet et al.
patent: 5705372 (1998-01-01), Belin et al.
patent: 25 40 624 (1976-04-01), None
patent: 10-084988 (1998-04-01), None
patent: 10-084989 (1998-04-01), None
patent: 1084989 (1998-04-01), None
Bovolenta et al. A Simple and Efficient Highly Enantioselective Synthesis of Alpha-Ionone and Alpha-Damascone. Journal of Organic Chemistry, 2004, vol. 69, 8959-8962.
Sugai, Takeshi et al., “A Synthetic Study of (−)-Dihydroedulan II and Related Compounds,” Tetrahedron, vol. 47, No. 35, pp. 7227-7236, 1991.
Oritani T. et al., “Synthesis and Absolute Stereochemistry of Chiral γ-Ionone and Dihydro-γ-ionone” (1987), Agric. Biol. Chem,. vol. 51, No. 5, p. 1271-1275.
Ishida Kenya
Yagi Kenji
Yamamoto Tetsuya
Haddaway Keith G.
Nelson Michael E.
Takasago International Corporation
Venable LLP
Witherspoon Sikarl A
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