Process for halogenation of conjugated dienes to dihalogenated b

Details Process for halogenation of conjugated dienes to dihalogenated b Process for halogenation of conjugated dienes to dihalogenated b

1973-04-13

1976-01-13

Gantz, Delbert E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 2104

Patent

active

039325431

ABSTRACT:
In the process for halogenation of conjugated dienes with elemental halogen under halogenation conditions, the improvement for obtaining increased yield of dihalogenated butene products comprising forming the reaction mixture with a dipolar aprotic solvent vehicle resistant to halogenation under such conditions in the proportion of about 0.05-10 moles per mole of said diene. The invention has particular application in the chlorination of isoprene to 1,4-dichloro-2-methyl-2-butene and 1,2-dichloro-2-methyl-3-butene.

REFERENCES:
patent: 2350373 (1944-06-01), Soday
patent: 2374711 (1945-05-01), Soday
patent: 2446475 (1948-08-01), Hearne et al.
patent: 3338982 (1967-08-01), Leach et al.
patent: 3793380 (1974-02-01), D'Ostrowick et al.

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