Purification of 2-methoxy-5-trifluoromethoxybenzaldehyde
US6686507B2 · kind B2 · utility
1Cited by
4References
6Claims
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Key dates
| Filing date | Dec 9, 2002 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Dec 9, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C251/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the purification of 2-methoxy-5-trifluoro-methoxy benzaldehyde oil in which the oil is converted to amine by reaction of a nitroaniline with the oil; the imine is isolated as a solid; and the solid imine is converted back to the 2-methoxy-5-trifluoromethoxy benzaldehyde oil. The nitroaniline is selected from the group consisting of 3-nitroaniline, 3-methyl-2-nitroaniline, 4-methyl-2-nitroaniline, 2 methyl-3-nitroaniline and 4-methyl-3-nitroaniline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.