Method for making o- and p- haloalkyl styrenes
US4045501A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1975 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Aug 4, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C22/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for making o- and p- halomethyl styrenes which comprises reacting an ethyl benzene, paraformaldehyde and hydrogen halide, treating the reaction product with a halogen, and dehydrohalogenating the resulting o- and p- halomethyl (1-haloethyl) benzenes at an elevated temperature using as dehydrohalogenating agent an amine acceptor of the generic formula: ##STR1## WHEREIN R is an alkyl group of 1 to 6 carbon atoms, n is an integer having a value of from 1 to 5, and at least one alkyl group is attached to a carbon atom adjacent to the nitrogen atom and when n is more than 1, the alkyl groups may be the same or different groups, and recovering a mixture of o- and p- halomethyl styrenes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.