Process for the preparation of 2,3,4,5-tetrafluorobenzene derivatives
2,3,4,5-tetrafluorobenzene derivatives can be obtained in a particularly advantageous manner by reacting the corresponding chlorobenzene or (chloro, fluoro)-benzene derivatives with a fluorinating agent in the presence of a solvent and a catalyst at eleva
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(2008/06/13)
Process for the preparation of polyhalogenated benzotrifluorides, benzotrichlorides and benzoyl chlorides and new trihalogenobenzotrichlorides and -benzoyl chlorides
Polyhalogenated benzotrifluorides can be reacted with chlorides from the series of Friedel-Crafts catalysts to give the corresponding benzotrichlorides, which can be hydrolysed by water in the presence of iron(III) chloride to give the corresponding benzoyl chlorides. These are suitable as intermediate products for the preparation of active compounds for medicaments and feed additives.
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(2008/06/13)
Process for the preparation of aromatic fluorinated compounds and novel diamides
Aromatic, ring-fluorinated compounds are prepared by reaction of corresponding chlorine compounds or bromine compounds with alkali metal fluorides using a diamide as solvent. Most of the diamides which can be used are novel compounds.
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(2008/06/13)
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