| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a new method for producing bicyclic 1,3-diketone salts, enabling economical production of these high-quality salts in a high yield. <P>SOLUTION: The method for producing the compound represented by formula (I) (wherein R<SB>1</SB>, R<SB>2</SB>, R<SB>3</SB>and R<SB>4</SB>are each independent from others and they are each hydrogen or a 1-4C alkyl; A and E are each mutually independent and they are each a 1-2C alkylene which can be substituted with a 1-4C alkyl group once to four times; M<SP>+</SP>is an alkali metal ion, an alkaline earth metal ion or ammonium ion) comprises oxidizing a compound represented by formula (II) to prepare a compound represented by formula (III) and producing the compound represented by formula (I) and a new bicyclic enol lactone intermediate to the compound of formula (III) used in the process in the presence of a base and a catalytic amount of a cyanide or an alkali metal alcoholate or an alkaline earth metal alcoholate by the subsequent conversion reaction. <P>COPYRIGHT: (C)2004,JPO</p> |
