Process for the preparation of dienes and/or trienes

Details Process for the preparation of dienes and/or trienes Process for the preparation of dienes and/or trienes

1982-07-16

1983-10-25

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By alkyl transfer, e.g., disproportionation, etc.

585600, 585613, 585646, 585647, C07C 600

Patent

active

044120893

ABSTRACT:
Process for the preparation of dienes and/or trienes comprising reacting a polyolefinically unsaturated compound in the presence of a heterogeneous disproportionation catalyst with a compound according to the general formula ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl, aryl, alkaryl or aralkyl group which may or may not contain one or more inert substituents or R.sup.1 and R.sup.2 form part of a cyclic structure together with the carbon atom to which they are attached. Isononadiene (2,6-dimethyl-1,5-heptadiene) and/or 2,6,10-trimethyl-1,5,9-undecatriene can be obtained by reacting cis-1,4-polyisoprene with isobutene in the presence of a heterogeneous disproportionation catalyst.

REFERENCES:
patent: 3634539 (1972-01-01), Alkema et al.
patent: 3637891 (1972-01-01), McGrath et al.
patent: 3855338 (1974-12-01), Fitton et al.

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