申请人:Kyowa Gas Chemical Industry Co., Ltd.
公开号:US04460403A1
公开(公告)日:1984-07-17
Novel 2,3-dicyanopyrazine derivatives of the formula ##STR1## wherein A represents a hydrogen atom, a lower alkyl group, an unsubstituted or substituted phenyl group, a benzyl group, or a group of the formula --ZR.sub.1 in which Z represents an oxygen or sulfur atom and R.sub.1 represents an unsubstituted or substituted lower alkyl group, a lower alkenyl group, a lower alkynyl group, an unsubstituted or substituted phenyl group, or an unsubstituted or substituted benzyl group; and B represents a halogen atom, an alkyl group containing at least 3 carbon atoms, a phenyl group having a substituent at the ortho- and/or meta-position of the benzene ring, a group of the formula ZR.sub.1 in which Z and R.sub.1 are as defined, or a group of the formula ##STR2## in which R.sub.2 and R.sub.3, independently from each other, represent a hydrogen atom, an unsubstituted or substituted lower alkyl group, a lower alkenyl group, a cycloalkyl group, an unsubstituted or substituted phenyl group, or an unsubstituted or substituted benzyl group, with the proviso that R.sub.2 and R.sub.3 do not represent a hydrogen atom at the same time, and R.sub.2 and R.sub.3 together may form a 3- to 7-membered heterocyclic ring together with the nitrogen atom to which they are bonded, said heterocyclic ring optionally containing an additional hetero atom; and processes for production thereof. These compounds have high herbicidal activity, and are useful as active ingredients of herbicides.
化合物2,3-二氰基吡嗪衍生物的式子为##STR1##其中A代表氢原子、较低的烷基、未取代或取代的苯基、苄基或式子--ZR.sub.1的基团,其中Z代表氧原子或硫原子,R.sub.1代表未取代或取代的较低烷基、较低烯基、较低炔基、未取代或取代的苯基或未取代或取代的苄基;B代表卤原子、含有至少3个碳原子的烷基、在苯环的邻位和/或间位有取代基的苯基、式子ZR.sub.1的基团,其中Z和R.sub.1的定义如上述,或式子##STR2##其中R.sub.2和R.sub.3独立地代表氢原子、未取代或取代的较低烷基、较低烯基、环烷基、未取代或取代的苯基或未取代或取代的苄基,但要求R.sub.2和R.sub.3不能同时代表氢原子,且R.sub.2和R.sub.3可以与它们所连接的氮原子一起形成3-至7-成员的杂环,所述杂环可以选择性地包含一个额外的杂原子;以及生产这些化合物的方法。这些化合物具有高除草活性,并且可用作除草剂的活性成分。