Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2006-01-27
2009-06-02
Gonzalez, Porfirio Nazario (Department: 1621)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C556S076000, C568S356000, C568S395000, C568S414000
Reexamination Certificate
active
07541307
ABSTRACT:
A silicon enolate represented by the following formula (Formula 1)(in the formula, R5to R7represent hydrogen atoms, aliphatic hydrocarbon groups, monocyclic or polycyclic alicyclic hydrocarbon groups, monocyclic or polycyclic aromatic or aromatic-aliphatic hydrocarbon groups or heterocyclic groups, R5and R7are different, R6is not a hydrogen atom, each R8may be identical or different and represents a methyl group, ethyl group or isopropyl group) and formaldehyde are allowed to react in an aqueous solution or a mixed solvent of water and an organic solvent in the presence of a catalyst obtained by mixing a ligand comprising a chiral bipyridine compound or its antipode and Bi(OTf)3.
REFERENCES:
patent: 2001-252570 (2001-09-01), None
patent: 2002-200428 (2002-07-01), None
Search Report dated Jun. 6, 2006 for International Application No. PCT/JP2006/301293 filed Jan. 27, 2006.
Shu Kobayashi et al., “Bismuth Triflate-Chiral Bipyridine Complexes as Water-Compatible Chiral Lewis Acids,” Organic Letters, 2005, pp. 4729-4731, vol. 7, No. 21.
Shunpei Ishikawa et al., “Catalytic Asymmetric Hydroxymethylation of Silicon Enolates Using an Aqueous Solution of Formaldehyde with a Chiral Scandium Complex,” Journal of the American Chemical Society, 2004, pp. 12236-12237, vol. 126, No. 39, Easton, PA (USA).
Kei Manabe et al., “Lewis Acid-Catalyzed Asymmetric Hydroxymethylation of Silicon Enolates in Aqueous Media,” Tetrahedron, Dec. 22, 2003, pp. 10439-10444, vol. 59, No. 52, Amsterdam, Netherlands.
Yumiko Kaku et al., “A Novel Route for Chiral Synthesis of the Triazole Antifungal ER-30346,” Chemical and Pharmaceutical Bulletin, Jul. 1998, pp. 1125-1129, vol. 46, No. 7, Pharmaceutical Society of Japan, Tokyo, Japan.
Chun Wu et al., “Chemical Studies on the Chiral Indanone Derivatives as the Inhibitor ofRenilla Luciferase”, Tetrahedron, 2001, pp. 9575-9583, vol. 57, Pergamon Press, Oxford, England.
Rajesh Kumar et al., “Lipase-Catalyzed chemo- and Enantioselective Acetylation of 2-Alkyl/aryl-3-hydroxypropiophenones,” Bioorganic & Medicinal Chemistry, 2001, pp. 2643-2652, vol. 9.
Aaron J. Reynolds et al., “The Intramolecular Carboxyarylation Approach to Podophyllotoxin,” Journal of the American Chemical Society, Sep. 13, 2003, pp. 12108-12109, vol. 125, American Chemical Society, Easton, PA (USA).
Ryoichi Kuwano et al., “Asymmetric Aldol Reaction of 2-Cyanopropionates Catalysed by Trans-chelating Chiral Diphosphine Ligand TRAP-Rhodium(I) Complex,” Chemical Communications, 1998, pp. 71-72, Royal Society of Chemistry, Cambridge, England.
Manabu Wadamoto et al., “Aldol Synthesis with an Aqueous Solution of Formalin,” Synlett, 2003, pp. 2219-2221, No. 14.
Jesús Casas et al., “Direct Organocatalytic Asymmetric α-Hydroxymethylation of Ketones and Aldehydes,” Tetrahedron Letters, 2004, pp. 6117-6119, No. 45, Pergamon Press, Oxford, England.
Shü Kobayashi, “Lanthanide Trifluoromethanesulfonates as Stable Lewis Acids in Aqueous Media. Yb(OTf)3Catalyzed Hydroxymethylation Reaction of Silyl Enol Ethers with Commercial Formaldehyde Solution,” Chemistry Letters, 1991, pp. 2187-2190.
Makoto Wada et al., “Asymmetric Trimethylsilylcyanation of Aldehydes Utlizing Chiral Bismuth Compounds. A Frontier in Bismuth Mediated Synthetic Reactions,” Tetrahedron, 1997, pp. 3939-3946, vol. 8, No. 23, Pergamon Press, Oxford, England.
European Supplementary Search Report corresponding to European Patent Application No. 06712459.4-1211 dated Feb. 4, 2009.
Kobayashi Shu
Manabe Kei
Gonzalez Porfirio Nazario
Japan Science and Technology Agency
Jenkins Wilson Taylor & Hunt, P.A.
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