Process for 1,1-dihalo-4-methyl-1, 3-pentadienes

Details Process for 1,1-dihalo-4-methyl-1, 3-pentadienes Process for 1,1-dihalo-4-methyl-1, 3-pentadienes

C - Chemistry, Metallurgy

07

C

260/662.1

C07C 21/19 (2006.01)

Patent

CA 1147349

PR-5612A PROCESS FOR 1,1-DIHALO-4-METHYL-1,3-PENTADIENES Abstract of the Disclosure 1,1-Dihalo-4-methyl-1,3-pentadienes are prepared by the catalytic dehydrohalogenation of 1,1,1,3-tetrahalo- 4-methylpentanes, in a novel process which involves heating the latter to a temperature of from about 150°C to about 200°C in the presence of a catalytic amount of a nitrogen base halide salt selected from the group consisting of tertiary amine hydrohalides in which the substituents on the nitrogen atom are alkyl or cycloalkyl containing a minimum of 3 carbon atoms each, N-alkyl alkyleneimine hydrohalides in which the alkyl group contains from 1 to 6 carbon atoms and the alkylene group contains from 3 to 7 carbon atoms, quinoline hydrohalides, and tetraalkylammonium halides in which at least three of the alkyl groups contain a minimum of 3 carbon atoms each.

360821

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