申请人:Sumitomo Chemical Company, Limited
公开号:US07223862B2
公开(公告)日:2007-05-29
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.
本发明提供一种生产吡啶化合物[d]的方法:[其中R3和R4如下定义],该方法通过在酸的存在下,使吡啶化合物[a]:[其中R1代表C1-C6烷氧基,R3代表卤素原子、氰基或硝基,R4代表氢原子或卤素原子]与α-重氮酯化合物[f]:N2CHCOR1[f] [其中R1如上定义]反应,从而获得具有优异除草活性的吡啶化合物[d]。