申请人:Kamekawa Hisato
公开号:US20090176990A1
公开(公告)日:2009-07-09
Disclosed is an improved process for producing nitroguanidine derivatives represented by the following general formula (3), which has an insecticidal activity, or a salt thereof. Specifically, disclosed is a process for producing nitroguanidine derivatives represented by the following general formula (3) or a salt thereof, in which nitroisourea derivatives represented by the following general formula (1) or a salt thereof and compounds represented by the following general formula (2) or a salt thereof are reacted in the presence of a base in an aqueous solution wherein an inorganic salt is dissolved at not less than 50% of its saturated solubility,
wherein, in the formula, R
1
represents an alkyl group having 1 to 4 carbon atoms or a benzyl group; R
2
represents an alkyl group having 1 to 4 carbon atoms; and R
3
represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
wherein, in the formula, R
4
, R
5
and R
6
each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and Q represents a 5- or 6-membered heterocyclic group which contains at least one each of a nitrogen atom, an oxygen atom and a sulfur atom and may be substituted with a halogen atom,
wherein, in the formula, R
2
represents an alkyl group having 1 to 4 carbon atoms; R
3
, R
4
, R
5
and R
6
each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and Q represents a 5- or 6-membered heterocyclic group which contains at least one each of a nitrogen atom, an oxygen atom and a sulfur atom and may be substituted with a halogen atom.
本发明公开了一种改进的生产具有杀虫活性的硝基胍衍生物或其盐的方法,其表示为以下通式(3)。具体地,本发明公开了一种在水溶液中,在不少于其饱和溶解度的50%处溶解无机盐的存在下,将以下通式(1)或其盐所表示的硝基异脲衍生物和以下通式(2)或其盐所表示的化合物与碱反应以制备以下通式(3)或其盐所表示的硝基胍衍生物的方法。其中,在公式中,R1表示具有1至4个碳原子的烷基或苄基;R2表示具有1至4个碳原子的烷基;R3表示氢原子或具有1至4个碳原子的烷基。在公式中,R4、R5和R6各自独立地表示氢原子或具有1至4个碳原子的烷基;Q表示含有至少一个氮原子、一个氧原子和一个硫原子的5-或6-成员杂环基团,并且可能被卤原子取代。在公式中,R2表示具有1至4个碳原子的烷基;R3、R4、R5和R6各自独立地表示氢原子或具有1至4个碳原子的烷基;Q表示含有至少一个氮原子、一个氧原子和一个硫原子的5-或6-成员杂环基团,并且可能被卤原子取代。