Cyclic acetals of the formula I ##STR1## where the substituents have the following meanings: R.sup.1 and R.sup.2 are hydrogen, unsubstituted or substituted alkyl or phenyl; additionally R.sup.1 and R.sup.2 together are an unsubstituted or substituted C.sub.2 -C.sub.6 -alkylene chain; Y is oxygen or sulfur; A has the meaning as given in claim 1; a process for preparing the acetals I and their use for the production of crop protection compositions are described.
公式I的环状
缩醛,其中取代基具有以下含义:R.sup.1和R.sup.2为氢、未取代或取代的烷基或苯基;另外R.sup.1和R.sup.2一起是未取代或取代的C.sub.2-C.sub.6-烷基链;Y为氧或
硫;A具有如权利要求1中所给出的含义;描述了制备
缩醛I的方法以及它们用于生产农药组合物的用途。