Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2005-03-09
2010-02-23
Gonzalez, Porfirio Nazario (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C502S172000
Reexamination Certificate
active
07667078
ABSTRACT:
An asymmetric reaction catalyst is obtained by mixing a pentavalent niobium compound and an optically active triol or tetraol having a binaphthol structure of R or S configuration, and the triol is represented by the following formula:(wherein, Y is divalent hydrocarbon and R1is a hydrogen atom, a halogen atom, a trifluoromethyl group, or an alkyl group or alkoxy group having at most 4 carbons).
REFERENCES:
patent: 6812352 (2004-11-01), Kreutzer et al.
patent: 7084293 (2006-08-01), Rosier et al.
patent: 7351831 (2008-04-01), Kobayashi et al.
patent: 4-91093 (1992-03-01), None
patent: 2001-31682 (2001-02-01), None
patent: 2002-275112 (2002-09-01), None
patent: 2003-299962 (2003-10-01), None
Arai et al. Synlett (2004), (6), 1104-1106.
Kobayashi et al., {A Novel Dinuclear Chiral Niobium Complex for Lewis Acid Catalyzed Enantioselective Reactions: Design of a Tridentate Ligand and Elucidation of the Catalyst Structure, Angewandte Chemie International Edition, vol. 44, Issue 5, 2005, pp. 761-764}.
Supplementary European Search Report dated Mar. 13, 2007 for European Patent No. 05720349.9, National Phase of PCT/JP2005/004077.
Database WPI Week 200281, Derwent Publications Ltd., XP002424390, AN 2002 746136, London, Great Britain.
Haruro Ishitani et al., “Efficient Catalytic Enantioselective Mannich-tupe Reactions Using a Zirconium-Bis (binaphthol) Methane Complex”, Tetrahedron Letters, 1999, pp. 2161-2164, No. 40, Pergamon Press, Oxford, England & New York.
Keiji Maruoka et al., “Chiral Helical Lewis Acids for Asymmetric Diels-Alder Catalysts”, Journal of Organic Chemistry, 1993, pp. 2938-2939, vol. 58, No. 11, XP-002422580, American Chemical Society, Columbus, Ohio.
Joshua Howarth et al., Lewis Acid Catalysis of the Diels-Alder Reaction Using Niobium and Tantalum Chlorides in the Presence of Coordinating Ligands, Molecules (On-Line), Aug. 5, 2000, pp. 993-997, vol. 5, XP-002424382.
Carlos Kleber Z. Andrade et al., “Niobium (V) Chloride-Mediated Allylation of Aldehydes. Scope and Stereoselectivity”, Tetrahedron Letters, Sep. 10, 2001, pp. 6473-6476, vol. 42, No. 37, Pergamon Press, Oxford, England & New York.
Shigeki Matsunaga et al., “Catalytic Enantioselective meso-Epoxide Ring Opening Reaction with Phenolic Oxygen Nucleophile Promoted by Gallium Hterobimetallic Multifunctional Complexes”, Journal of the American Chemical Society, 2000, pp. 2252-2260, vol. 122, No. 10, American Chemical Society, Easton, PA.
Shu Kobayashi et al., “A Novel Dinuclear Chiral Niobium Complex for Lewis Acid Catalyzed Enantioselective Reactions: Design of a Tridentate Ligand and Elucidation of the Catalyst Structure”, Angewandte Chemie, International Edition, 2005, pp. 761-764, vol. 44, No. 5, XP002424384.
Ishitani Haruro
Kobayashi Shu
Yamashita Yasuhiro
Gonzalez Porfirio Nazario
Japan Science and Technology Agency
Jenkins Wilson Taylor & Hunt, P.A.
Nwaonicha Chukwuma O
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