| 摘要 |
<p>There is provided a process for preparing a carboxylic acid ester of formula (3): R<2>COOR<1> (3) wherein R<1> is an alkyl group which may be substituted, an alkenyl group which may be substituted, an alkynyl group which may be substituted, an aralkyl group which may be substituted, or a heteroarylalkyl group which may be substituted, and R<2> is an alkyl group which may be substituted, an alkenyl group which may be substituted, an alkynyl group which may be substituted, an aryl group which may be substituted, a heteroaryl which may be substituted, an aralkyl group which may be substituted, or a heteroarylalkyl group which may be substituted, which process is characterized by the steps of reacting a monohydroxy compound of formula (1): R<1>OH wherein R<1> is as defined above, with a zirconium compound of formula (6): Zr(OR<8>)4 wherein R<8> is an alkyl group or an aryl group which may be substituted and is not the same as R<1>, to prepare a zirconium catalyst, and reacting a carboxylic acid of formula (2): R<2>COOH wherein R<2> is as defined above, with the monohydroxy compound of formula (1) in the presence of the zirconium catalyst.</p> |
