Method for producing benzoyl formic acid compound and pyridazine compound
AssigneeSumitomo Chemical Company, Limited
InventorsTadafumi MATSUNAGA, Yasuhiro KATAOKA, Masato KAWAMURA, Shun TANIMURA
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Abstract
The present invention provides an industrially-advantageous process for preparing a benzoyl formic acid compound, and an efficient process for preparing a pyridazine compound using the same process. Specifically, the present invention provides a process for preparing a compound represented by formula (2), which comprises a step (B): a step of reacting a compound represented by formula (1) with a nitrosyl sulfuric acid in water to produce the compound represented by formula (2).
Claims11
A process for preparing a below-mentioned compound represented by formula (2), which comprises a step (B):
- a step of reacting a compound represented by formula (1):
- wherein, R1, R2, R3, R4 and R5 each independently represents a fluorine atom, a chlorine atom, a bromine atom, a hydrogen atom, a hydrocarbon group, or a hydrocarbon group substituted with halogen atom(s),
- with a nitrosyl sulfuric acid in the presence of water to produce the compound represented by formula (2):
- wherein, R1, R2, R3, R4 and R5 are the same as defined above.
Dependencies are inferred from the claim text.