Process for the preparation of ketimines
US6806386B1 · kind B1 · utility
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2References
33Claims
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Assignee
Inventors
Key dates
| Filing date | May 14, 2002 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | May 30, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C249/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.