A process for producing a dicarboxylic acid compound represented by the formula (4): wherein R1 and R2 are the same or different and each represents lower alkyl and the wavy line indicates that this compound is the E- or Z-isomer or
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Page 24, 25
(2008/06/13)
Process of producing 2-cyano-4-oxo-4H-benzopyran compounds
There is disclosed a process of producing a 2-cyano-4-oxo-4H-benzopyran compound of the general formula (2): STR1 wherein R1 and R2 are independently hydrogen, halogen, hydroxy, C1 -C5 alkyl, C1 -Csu
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(2008/06/13)
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