Process for the preparation of 4-halomethylbenzaldehyde
AssigneeWacker Chemie AG
InventorsHermann Braunling, Dieter Kippe
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Abstract
A process for the preparation of 4-chloromethylbenzaldehyde, 4-bromomethylbenzaldehyde and 4-iodomethylbenzaldehyde is disclosed. The desired 4-halomethylbenzaldehyde is prepared by reacting 4-hydroxymethylbenzaldehyde with the appropriate gaseous hydrogen halide and/or with the appropriate aqueous hydrohalic acid. The 4-halomethylbenzaldehydes produced by the disclosed process are useful as raw materials for pharmaceuticals and serve as starting materials for the preparation of conductive organic compounds.
Claims13
A process for the preparation of a 4-halomethylbenzaldelhyde, the halogen being chlorine, bromine or iodine, comprising the step of:
- reacting 4-hydroxymethylbenzaldehyde with a hydrogen halide selected from the group consisting of gaseous hydrogen chloride, aqueous hydrochloric acid, a combination of gaseous hydrogen chloride and aqueous hydrochloric acid, gaseous hydrogen bromide, aqueous hydrobromic acid, a combination of gaseous hydrogen bromide and aqueous hydrobromic acid, gaseous hydrogen iodide, aqueous hydriodic acid and a combination of gaseous hydrogen iodide and aqueous hydriodic acid.
Dependencies are inferred from the claim text.