The invention relates to new 4-chloro-aryloxy-acetyl- or 4-chloro-aryloxy-propionyl-malonates of the general Formula I, ##STR1## a process for the preparation thereof and herbicidal compositions comprising the same. In the general Formula I R.sup.1 stands for chlorine or methyl; R.sup.2 represents hydrogen or chlorine; R.sup.3 stands for hydrogen or methyl; R.sup.4 represents C.sub.1-4 alkyl and the two R.sup.4 groups may be identical or different; and X is --N.dbd. or --CH.dbd.. The compounds of the general Formula I may be prepared by reacting a compound of the general Formula II ##STR2## with a metal derivative of a malonate of the general Formula III; ##STR3## or in the presence of an metal compound with a malonate of the general Formula III; or by reacting a compound of the general Formula IV ##STR4## with a compound of the general Formula V ##STR5## (in which Formulae R.sup.1, R.sup.2, R.sup.3, R.sup.4 and X are as stated above; Z stands for halogen and Y represents halogen, cyano or alkylcarbonyloxy). The new compounds of the general Formula I possess valuable herbicidal properties.
本发明涉及一种新的4-
氯-芳氧基乙酰基-或4-
氯-芳氧基丙酰基-
丙二酸盐,其通式为I, ##STR1## 以及其制备方法和包含该化合物的
除草剂组合物。在通式I中,R.sup.1代表
氯或甲基;R.sup.2代表氢或
氯;R.sup.3代表氢或甲基;R.sup.4代表C.sub.1-4烷基,两个R.sup.4基团可以相同也可以不同;X为--N.dbd.或--CH.dbd.。通式I的化合物可以通过将通式II的化合物 ##STR2## 与通式III的
丙二酸盐的
金属衍
生物反应制备;或在
金属化合物的存在下,与通式III的
丙二酸盐反应制备;或通过将通式IV的化合物 ##STR4## 与通式V的化合物 ##STR5## 反应制备(其中通式中的R.sup.1、R.sup.2、R.sup.3、R.sup.4和X如上所述;Z代表卤素,Y代表卤素、
氰基或烷基羰氧)。通式I的新化合物具有有价值的除草性能。