Process for preparing 2-alkyl-3-aminothiophene derivative and 3-aminothiophene derivative
申请人:——
公开号:US20010023295A1
公开(公告)日:2001-09-20
A compound represented by the formula (1) which is useful as an agricultural fungicide or an intermediate thereof can be obtained by reacting a compound of the general formula (2) with a compound of the general formula (3) in the presence of an acid-and reducing the resulted reaction mixture.
1
wherein, each of R
1
to R
4
and R
1a
to R
4a
independently represents a hydrogen atom or an alkyl group, and R represents an alkyl group, alkoxy group, phenyl group or 5-membered or 6-membered heterocyclic group.
通式(2)化合物与通式(3)化合物在酸的存在下反应,并还原反应混合物,可得到由式(1)表示的可用作农用杀菌剂的化合物或其中间体。
1
其中,R
1
至 R
4
和 R
1a
到 R
4a
分别代表氢原子或烷基,R 代表烷基、烷氧基、苯基或 5 元或 6 元杂环基团。