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US 5,710,341 AGranted
Preparation of .alpha.-chloroalkyl aryl ketones
AssigneeBASF SE
InventorsWolfgang Siegel, Walter Dobler, Michael John
Life of this patent
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Abstract
A process for preparing .alpha.-chloroalkyl aryl ketones of the formula I ##STR1## where n is 1 to 5, R.sub.1 independently of one another are H, alkyl, alkoxy, aryl, aryloxy, acyloxy, acylamino, halogen or nitro, R.sub.2,3 independently of one another are H, alkyl or aryl, by chlorination of alkyl aryl ketones of the formula II ##STR2## with sulfuryl chloride is described, the chlorination being carried out in the presence of an aliphatic alcohol.
Claims4
A process for preparing .alpha.-chloroalkyl aryl ketones of the formula I ##STR7## where n is 1 to 5,
- R.sub.1 independently of one another are H, alkyl, alkoxy, aryl, aryloxy, acyloxy, acylamino, halogen or nitro,
- R.sub.2,3 independently of one another are H, alkyl or aryl,
- by chlorination of alkyl aryl ketones of the formula II ##STR8## with sulfuryl chloride, which comprises carrying out the chlorination in the presence of an aliphatic alcohol.
Dependencies are inferred from the claim text.