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US 2001/0020103 A1Published application
Ester and process for producing the same
AssigneeDaicel Chemical Industries, Ltd.
InventorsMitsuru Ohno, Noritsugu Yamasaki, Satoru Nose
Life of this patent
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Abstract
6-Alkoxycarbonylmethyl-4H-1,3-dioxin-4-one derivatives are produced by reacting a 6-halomethyl-4H-1,3-dioxin-4-one derivative with carbon monoxide and an alcohol or water, and 3-oxopentanedicarboxylic acid esters are further produced by reacting the above derivatives with an alcohol or water. Such a process can produce 3-oxopentanedicarboxylic acid esters in an easy and simple and efficient manner.
Claims15
A cyclic ester represented by the formula (1):
- 7
- wherein R1, R2 and R3 are the same or different and each represents a hydrogen atom or a chain or cyclic aliphatic hydrocarbon group, which may optionally be further substituted.
A process for producing dicarboxylic acid esters represented by the formula (5):
- 9
- wherein R1 and R4 are the same or different and each represents a hydrogen atom or a chain or cyclic aliphatic hydrocarbon group, which may optionally be further substituted, which comprises reacting a cyclic ester represented by the formula (1):
- 10
- wherein, R1, R2 and R3 are the same or different, R1 is as defined above and R2 and R3 each represents a hydrogen atom or a chain or cyclic aliphatic hydrocarbon group, which may optionally be further substituted, with an alcohol or water represented by the formula (4):
- R4-OH (4)
- wherein R4 is as defined above.
3 more elements
A halogen compound represented by the formula (2):
- 11
- wherein X is a halogen atom and R2 and R3 are as defined above relative to the above formula (1).
Dependencies are inferred from the claim text.