Preferential aliphatic halogenation of ar-substituted alkylbenzenes
US4133837A · kind A · utility
3Cited by
5References
10Claims
0Family size
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Inventor
Key dates
| Filing date | Nov 17, 1977 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Nov 17, 1997 |
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-chlorocumene, 3-chlorocumene and 4-chlorocumene, the alkyl groups of the 3-isomer and 4-isomer react preferentially with a halogen in the presence of a catalyst such as benzoyl peroxide to form a 3-halo-1-(.alpha.-alkyl, .alpha.-halo)alkylbenzene and 4-halo-1-(.alpha.-alkyl, .alpha.-halo)alkylbenzene such as 3-chloro-.alpha.-bromocumene, and 4-chloro-.alpha.-bromocumene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.