申请人:Tokuyama Soda Kabushiki Kaisha
公开号:US05234894A1
公开(公告)日:1993-08-10
A cyanoketone derivative of the following formula (1) ##STR1## wherein A.sub.1 is a substituted or unsubstituted phenyl or naphthyl group or a substituted or unsubstituted heterocyclic group; each of X.sub.1, X.sub.2 and X.sub.3 is independently an oxygen or sulfur atom; each of B.sub.1, B.sub.2 and B.sub.3 is independently a hydrogen atom or C.sub.1 -C.sub.6 -alkyl group; each of Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 is independently a hydrogen atom, a halogen atom or a C.sub.1 -C.sub.6 -alkyl group; and A.sub.2 is a substituted or unsubstituted group selected from the group consisting of a C.sub.1 -C.sub.6 -alkyl group, a C.sub.2 -C.sub.6 -alkenyl group, a C.sub.2 -C.sub.6 -alkynyl group, a C.sub.1 -C.sub.4 -alkoxy group, a C.sub.1 -C.sub.4 -alkylthio group, a C.sub.1 -C.sub.6 -alkoxycarbonyl group, an unsubstituted benzoyl group, a halogen-substituted benzoyl group, a cyano group or a group as defined in A.sub.1 ; provided that when B.sub.1 is a hydrogen atom and B.sub.2 is alkyl, the compound of the formula (1) is an R- or S-enantiomer with regard to asymmetric carbon to which B.sub.1 and B.sub.2 are bonded, or a mixture of these enantiomers. The cyanoketone derivative has a remarkably high herbicidal activity and is effective against a variety of gramineous weeds.
以下是式子(1)的氰酮衍生物:
##STR1##
其中,A.sub.1是取代或未取代的苯基或萘基或取代或未取代的杂环基;X.sub.1、X.sub.2和X.sub.3中的每一个都是独立的氧原子或硫原子;B.sub.1、B.sub.2和B.sub.3中的每一个都是独立的氢原子或C.sub.1-C.sub.6烷基;Y.sub.1、Y.sub.2、Y.sub.3和Y.sub.4中的每一个都是独立的氢原子、卤素原子或C.sub.1-C.sub.6烷基;A.sub.2是从C.sub.1-C.sub.6烷基、C.sub.2-C.sub.6烯基、C.sub.2-C.sub.6炔基、C.sub.1-C.sub.4烷氧基、C.sub.1-C.sub.4烷基硫基、C.sub.1-C.sub.6烷氧羰基、未取代苯甲酰基、卤素取代苯甲酰基、氰基或如A.sub.1中定义的基中选择的取代或未取代基;但是,当B.sub.1是氢原子且B.sub.2是烷基时,式子(1)的化合物是与B.sub.1和B.sub.2连接的不对称碳原子的R-或S-对映异构体,或这些对映异构体的混合物。该氰酮衍生物具有极高的除草活性,对多种禾本科杂草有效。