| 摘要 |
PROBLEM TO BE SOLVED: To obtain a carbonic ester in high yield, by reacting carbon dioxide with an alcohol in the presence of a specific metallic alkoxide. SOLUTION: This objective compound is obtained by reacting carbon dioxide and (B) an alcohol (e.g. metanol) in the presence of a metallic alkoxide [e.g. Cp2 Ti(OMe)2 (Me is methyl)] expressed by the formula, Cp2 M(OR<2> )2 (Cp is cyclopentadienyl, etc.; R<2> is an alkyl, etc.; M is titanium, zirconium or hafnium), preferably, at room temperature to 200 deg.C and 1-500 atmospheric pressure for 1-10 hr. The weight ratio to be used (catalytic quantity) of the component A to the component B is preferably 1/10<5> -1/10. In the above reaction, a dehydrating agent (e.g. magnesium sulfate) is preferably used. |
