Process for preparing diesters of malonic acid
AssigneeUbe Industries, Ltd.
InventorsKenji Nishimura, Shinichi Furusaki, Yasushi Shiomi, Kozo Fujii, Keigo Nishihira, Masayoshi Yamashita
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Abstract
A process for preparing a diester of malonic acid which comprises reacting ketene and carbon monoxide with an ester of nitrous acid catalytically in the presence of metallic palladium or a salt thereof.
Claims7
A process for preparing a diester of malonic acid which comprises reacting ketene and carbon monoxide with an ester of nitrous acid catalytically in the presence of metallic palladium or a salt thereof in (i) a gaseous phase at a temperature ranging from 80.degree. to 150.degree. C. or (ii) in a liquid phase at a temperature ranging from room temperature to 200.degree. C., said ester being selected from esters of nitrous acid with saturated monovalent aliphatic or alicyclic alcohols having 1-8 carbon atoms.
Dependencies are inferred from the claim text.