Process for the preparation of difluorobenzodioxole and chlorofluorobenzodioxole
AssigneeBayer Aktiengesellschaft
InventorsKarl-Erwin Schnalke, Josef Heinrich, Fritz Doring
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Abstract
A novel process for the preparation of benzodioxoles of the formula (I) ##STR1## in which Hal represents a chlorine atom or a fluorine atom, from dichlorobenzodioxole using stoichiometric quantities of anhydrous hydrofluoric acid.
Claims3
A process for the preparation of a benzodioxole of the formula ( I ) ##STR8## in which Hal is a chlorine atom or a fluorine atom, which comprises metering into a dichlorobenzodioxole of the formula (II) ##STR9## a stoichiometric quantity of anhydrous hydrofluoric acid at a temperature between -10.degree. and room temperature and under pressure of between 1 and 10 bar.
Dependencies are inferred from the claim text.