Title:
PROCESS FOR PRODUCING 5−SUBSTITUTED 2&lpar 5H&rpar −FURANONE
Document Type and Number:
WIPO Patent Application WO/2003/045934
Kind Code:
A1
Abstract:
A process for producing a 5−alkoxy−2(5H)−furanone represented by the general formula (IV), characterized by reacting a 2(3H)−furanone compound represented by the general formula (I) with an alcohol represented by the general formula (II) and a halogenating agent to obtain a 4−alkoxy−3−halogeno−&gammad −butyrolactone represented by the general formula (III) and reacting the resultant 4−alkoxy−3−halogeno−&gammad −butyrolactone with a base. (I) (II) (III) (IV) (In the formulae, R1 represents hydrogen, optionally substituted alkyl, optionally substituted aryl, or optionally substituted aralkyl&semi R2 represents optionally substituted alkyl, optionally substituted cycloalkyl, or optionally substituted aralkyl&semi and X represents halogeno.) Thus, a 5−substituted 2(5H)−furanone, such as a 5−alkoxy−2(5H)−furanone, can be industrially advantageously produced efficiently at low cost.
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Inventors:
SUGIOKA TAKASHI (JP)
Application Number:
PCT/JP2002/011346
Publication Date:
June 05, 2003
Filing Date:
October 31, 2002
Export Citation:
Assignee:
KURARAY CO (JP)
SUGIOKA TAKASHI (JP)
SUGIOKA TAKASHI (JP)
International Classes:
C07D307/60; (IPC1-7): C07D307/60; C07D307/33
Other References:
FERINGA BEN L., DE LANGE BEN: "Asymmetric 1,4-additions to 5-alkoxy-2(5H)-furanones. An efficient synthesis of (R)- and (S)- 3,4-epoxy-1-butanol", TETRAHEDRON, vol. 44, no. 23, 1988, pages 7213 - 7222, XP002961008
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