Preferential aliphatic halogenation of ar-substituted alkylbenzenes
US4087473A · kind A · utility
3Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Nov 3, 1976 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | Nov 3, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In an isomeric mixture of ar-substituted-1-(sec-alkyl)benzenes, such as a mixture of 2,4-dichlorocumene and 3,5-dichlorocumene, the alkyl group of the 3,5-isomer reacts preferentially with a halogen in the presence of a catalyst such as benzoyl peroxide to form a 3,5-dihalo-(.alpha.-alkyl, .alpha.-halo)alkylbenzene such as 3,5-dichloro-.alpha.-bromocumene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.