PROCESS FOR PREPARING DIHYDROFURANONE DERIVATIVES

The present invention provides a process for preparing dihydrofuranone derivative of the formula (II): (II) wherein R1 and R3 are individually lower alkyl, and R2 is hydrogen or lower alkyl, by reacting a dihydrofuranone derivative of the formula (I): (I) wherein R1 is as defined above, with a malon...

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Bibliographic Details
Main Authors IMUTA, JUNICHI, KIHARA, NORIAKI, ORI, AIICHIRO
Format Patent
LanguageEnglish
French
Published 08.11.1991
Edition5
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary:The present invention provides a process for preparing dihydrofuranone derivative of the formula (II): (II) wherein R1 and R3 are individually lower alkyl, and R2 is hydrogen or lower alkyl, by reacting a dihydrofuranone derivative of the formula (I): (I) wherein R1 is as defined above, with a malonic acid derivative of the formula (II): (II) wherein R2 and R3 are as defined above, in the presence of an alkalimetal alkoxide and/or an alkalimetal hydroxide.
Bibliography:Application Number: CA19912041813