Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2007-08-08
2011-11-15
Sullivan, Daniel (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
Reexamination Certificate
active
08058471
ABSTRACT:
The present invention has its object to provide a method for producing an optically active hydroxycarboxylic acid derivative which is an intermediate important for production of medicines, agrochemicals, chemical products, and so on. The production method of the present invention comprises: carrying out a hydrogen-transfer reduction of a ketocarboxylic acid or a salt thereof by the reaction of an optically active diamine complex to produce an optically active hydroxycarboxylic acid derivative. According to the present invention, it is possible to safely and efficiently produce an industrially-useful optically active hydroxycarboxylic acid derivative.
REFERENCES:
patent: 4614806 (1986-09-01), Buzby, Jr. et al.
patent: 5066815 (1991-11-01), Sayo et al.
patent: 5686275 (1997-11-01), Casey et al.
patent: 6284925 (2001-09-01), Knochel et al.
patent: 2003/0004362 (2003-01-01), Tada et al.
patent: 63-316744 (1988-12-01), None
patent: 7-502410 (1995-03-01), None
patent: 9-157196 (1997-06-01), None
patent: 10-120621 (1998-05-01), None
patent: 2000-053593 (2000-02-01), None
patent: 2001-199928 (2001-07-01), None
patent: 2003-034665 (2003-02-01), None
patent: WO-2005-049816 (2005-06-01), None
Ikariya et al. (Derwent abstract of JP 2001199928).
Spitaleri et al. (Inorganica Chimica Acta, 2003, 352, 61-71).
Ogo et al. (Organometallics, 2002, 21, 2964-2969).
Eduardo M. Rustoy, et al.; “Combination strategy using pure enzymes and whole cells as biocatalysts for the preparation of 2-hydroxyesters and lactones from 2-oxoglutaric acid”; Eduardo M. Rustoy, et al.; Tetrahedron: Asymmetry 15 (2004) 3763-3768.
Zhe Wang et al.; “Enantioselective Synthesis of α-Hydroxy Carboxylic Acids: Direct Conversion of α-Oxocarboxylic Acids to Enantiomerically Enriched α-Hydroxy Carboxylic Acids via Neighboring Group Control”; Zhe Wang et al.; Tetrahedron Letters 39 (1998) 5501-5504.
Felix Spindler et al; “A Highly Enantioselective Rhodium Catalyst for the Hydrogenation of Aliphatic α-Keto Esters”; Felix Spindler et al; CHIRALITY 3:370-375 (1991).
English translation of International Preliminary Report on Patentability (Chapter I) issued in related International Application No. PCT/JP2007/065559 on Mar. 10, 2009.
Amano Susumu
Fujii Akio
Mitsuda Masaru
Yamamoto Shohei
Connolly Bove & Lodge & Hutz LLP
Kaneka Corporation
Sawyer Jennifer C
Sullivan Daniel
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