Substituted 1,3-benzadioxane-4-ones and 1,3-benzathioxane-4-ones, their
申请人:——
公开号:US05569640A1
公开(公告)日:1996-10-29
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.