Process for aqueous chromate ion oxidation of allylic halides and halomethylated aromatics to allylic and aromatic aldehydes
US4174352A · kind A · utility
3Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1978 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | May 8, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/27
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing an allylic or an aromatic aldehyde, such as acrolein or benzaldehyde, the process comprising contacting in a basic, liquid, biphasic mixture and at reactive conditions an allylic halide or a halomethylated aromatic, such as allyl or benzyl chloride, with a divalent chromate ion, is improved by contacting the allylic halide or halomethylated aromatic with the divalent chromate ion in the presence of a catalytic amount of a quaternary ammonium and/or phosphonium salt, such as tetra-n-butylammonium chloride. The improved process is faster, cleaner and more complete than the process of the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.