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US 5,508,446 AGranted
Method for producing alkyl 3-phthalidylideneacetate
AssigneeSumika Fine Chemicals Co., Ltd.
InventorTaketo Hayashi
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Abstract
A method for producing an alkyl 3-phthalidylideneacetate has the step of treating phthalic anhydride with a monoalkyl malonate or a salt thereof having the following formula: MOCO--CH.sub.2 --COOR, wherein M represents a hydrogen atom, K, Na, Li, or NH.sub.4, and R represents a lower alkyl group having 1 to 5 carbon atoms. By using the above method, the desired alkyl 3-phthalidylideneacetate can be obtained at a high yield.
Claims10
A method for producing an alkyl 3-phthalidylideneacetate, comprising the step of treating phthalic anhydride with a monoalkyl malonate or a salt thereof having the following formula:
- MOCO--CH.sub.2 --COOR,
- wherein M represents a hydrogen atom, K, Na, Li, or NH.sub.4, and R represents a lower alkyl group having 1 to 5 carbon atoms.
Dependencies are inferred from the claim text.