2,5-Dimethyl-2,4-hexadiene production

Details 2,5-Dimethyl-2,4-hexadiene production 2,5-Dimethyl-2,4-hexadiene production

1976-07-02

1978-12-19

Hearn, Brian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260654D, C07C 1112

Patent

active

041305981

ABSTRACT:
Process for the production of 2,5-dimethyl-1,5-hexadiene by heating isobutene with a 1,1,2-trihalo ethylene in the vapor phase in the presence of a free-radical generator. The free-radical generator is preferably a peroxide and the reaction temperature in the range 200.degree.-600.degree. C. The product may be readily isomerized to 2,5-dimethyl-2,4-hexadiene, which is useful as an insecticide intermediate.

REFERENCES:
patent: 2818441 (1957-12-01), Vaughan et al.
patent: 3406210 (1968-10-01), Schmerling
patent: 3472908 (1969-10-01), Harder
patent: 3819731 (1974-06-01), Pitt et al.
Rust et al., "Decomposition of Di-t-Alkyl Peroxides", J.A.C.S., vol. 70, No. 95, pp. 95-99 (1948).
Henne et al., "Olefins and Diolefins from Allylic Chlorides", J.A.C.S., vol. 63, pp. 3474-3476 (1941).
Petrov et al., "High Temperature Condensation of Tetrachlorethylene with Aromatic Hydrocarbons & Olefins", Doklady Akademii Nauk SSSR, vol. 131, No. 5, pp. 1098-1011, Apr. 1960.

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