Substituted 1,3-benzadioxane-4-ones and 1,3-benzathioxane-4-ones, their preparation and their conversion to crop protection agents

US5569640A · kind A · utility

Inventors

• Joachim Rheinheimer · Ludwigshafen, DE
• Uwe Josef Vogelbacher · Ludwigshafen, DE
• Ernst Baumann · Dudenhofen, DE
• Hartmann Konig · Heidelberg, DE
• Matthias Gerber · Schifferstadt, DE
• Karl-Otto Westphalen · Speyer, DE
• Helmut Walter · Obrigheim, DE

Key dates

• Filing date: Nov 1, 1994
• Grant date: Oct 29, 1996
• Expiry date: Nov 1, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/0812
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

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; PA1 Y is oxygen or sulfur; PA1 A has the meaning as given in claim 1; PA1 a process for preparing the acetals I and their use for the production of crop protection compositions are described.