Method of making benzoyl halides and nitriles
US6313337A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Apr 17, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/64
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method of making a benzoyl halide is disclosed. Into a reactor is placed a reaction mixture of a benzotrihalide and a benzaldehyde having the respective general formulas ##STR1## where each A is independently selected from halogen, CF.sub.3, R, or OR, each B is independently selected from halogen, CF.sub.3, or R, R is alkyl from C.sub.1 to C.sub.10 or aryl from C.sub.6 to C.sub.12, each X is independently selected from Cl and Br, m is 0 to 3, and n is 0 to 2. Also added is at least about 10 ppm of a catalyst selected from the group consisting of zinc salts and copper salts, and an optional solvent. The addition of an ammonium halide to the product mixture forms the corresponding amide, which can be dehydrated to form the corresponding nitrile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.