Process for the preparation of ketimines
AssigneeCiba Specialty Chemicals Corporation
InventorsMarc Thommen, Andreas Hafner, Frédëric Brunner, Hans-Jörg Kirner, Roman Kolly
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Abstract
The present invention relates to a process for the preparation of compounds of formula (1), in which R1, R2 and R3 independently of one another are hydrogen, halogen , trifluoromethyl of or C1-C4alkoxy, wherein a compound of formula (2), in which R1, R2 and R3 are as defined in formula (1), is reacted with methlyamine in the presence of a non-alcoholic solvent and, if desired, in the presence of a sulfonic acid catalyst to give the compound of formula (2) and, if desired, is subject to purification by recrystallization.
Claims33
A process for the preparation of compounds of the formula
- in which R1, R2 and R3 independently of one another are hydrogen, halogen, trifluoromethyl or C1-C4alkoxy,
- wherein a compound of the formula
- in which R1, R2 and R3 are as defined in formula (1),
- is reacted with methylamine in the presence of a sulfonic acid catalyst and of a non-alcoholic solvent to give the compound of the formula (1).
Dependencies are inferred from the claim text.