Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-05-02
2006-05-02
Tsang, Cecilia J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C549S313000
Reexamination Certificate
active
07038064
ABSTRACT:
A process of the present invention produces a hydroxylactone by subjecting an unsaturated carboxylic acid having a double bond not conjugated to a carboxyl group or an ester thereof to (i) a reaction with hydrogen peroxide in the presence of a metallic compound containing a metallic element selected from W, Mo, V and Mn or (ii) a reaction with a peroxide containing the metallic element to thereby yield a corresponding hydroxylactone having a hydroxyl group combined with one of carbon atoms constituting the double bond and being cyclized at the other carbon atom position. The metallic compound may be one selected from oxides, oxoacids and salts thereof. The unsaturated carboxylic acid includes, for example, β,γ-unsaturated carboxylic acids, γ,δ-unsaturated carboxylic acids, and δ,ε-unsaturated carboxylic acids. The process can produce hydroxylactones in high yields at low cost.
REFERENCES:
patent: 2000-159693 (2000-06-01), None
Tan et al., Journal of Molecular Catalysis A: Chemical 142 (1999) pp. 333-338.
Inoue Keizo
Ishii Yasutaka
Nakano Tatsuya
Birch & Stewart Kolasch & Birch, LLP
Covington Raymond
Diacel Chemical Industries Ltd.
Tsang Cecilia J.
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