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US 2006/0189484 A1Published application
Pyridone compounds useful for producing pyridine compounds
AssigneeSumitomo Chemical Company, Limited
InventorsYoshitomo Tohyama, Takashi Komori, Yuzuru Sanemitsu
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Abstract
The present invention provides a process for producing the pyridine compound [d]: [wherein R3 and R4 are as defined below], which has an excellent herbicidal activity, by making a pyridine compound [a]: [wherein R1 represents a C1-C6 alkoxy group, R3 represents a halogen atom, cyano group or nitro group, and R4 ρεπρεσεντσ α ηψδρογεν ατομ ορ ηαλογεν ατομ] ρεαχτ ωιτη αν α-diazoester compound [f]: N2CHCOR1 [f] [wherein R1 is defined above] in the presence of an acid.
Claims3
A pyridone compound of the general formula (a):
- wherein R3 represents a halogen atom, cyano group or nitro group, and R4 represents a hydrogen atom or halogen atom.
Dependencies are inferred from the claim text.