发明授权
US07223862B2 Pyridone compounds useful for producing pyridine compounds 有权
可用于生产吡啶化合物的吡啶酮化合物

Pyridone compounds useful for producing pyridine compounds
摘要:
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.
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