Process for producing chromone compound

Details Process for producing chromone compound Process for producing chromone compound

2006-08-22

2006-08-22

Dentz, Bernard (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S401000

Reexamination Certificate

active

07094914

ABSTRACT:
A process for producing a dicarboxylic acid compound represented by the formula (4):wherein R1and R2are the same or different and each represents lower alkyl and the wavy line indicates that this compound is the E- or Z-isomer or a mixture of them, characterized by reacting a compound represented by the formula (2):wherein R1, R2and the wavy line have the same meanings as the above, and one of X2and X3represents hydrogen and the other represents halogen, with nitrophenol represented by the formula (3):in the presence of a base; a process for producing a nitrochromone compound represented by the formula (5):wherein R1has the same meaning as the above, characterized by reacting the dicarboxylic acid compound or carboxylic acid thereof with an acid; a process for producing an aminochromone compound which comprises reducing the nitrochromone compound; and a process for producing an amidochromone compound which comprises acylating the aminochromone compound are provided.

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