申请人:——
公开号:US20040254077A1
公开(公告)日:2004-12-16
The present invention provides a process for producing the pyridine compound [d]:
1
[wherein R
3
and R
4
are as defined below],
which has an excellent herbicidal activity, by making a pyridine compound [a]:
2
[wherein R
1
represents a C
1
-C
6
alkoxy group, R
3
represents a halogen atom, cyano group or nitro group, and R
4
represents a hydrogen atom or halogen atom] react with an &agr;-diazoester compound [f]:
N
2
CHCOR
1
[f]
[wherein R
1
is defined above]
in the presence of an acid.
本发明提供了一种生产具有优异除草活性的吡啶化合物[d]:1 [其中R3和R4如下定义]的方法,该方法通过使吡啶化合物[a]:2 [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如上所定义]在酸的存在下反应。