Process for preparing 5-ethylidene-2-norbornene with high qualit

Details Process for preparing 5-ethylidene-2-norbornene with high qualit Process for preparing 5-ethylidene-2-norbornene with high qualit

1986-12-18

1988-02-23

Pal, Asok

Chemistry of hydrocarbon compounds

Alicyclic compound synthesis

By double-bond shift

585363, C07C 525

Patent

active

047272040

ABSTRACT:
5-Ethylidene-2-norbornene with high quality is effectively prepared by isomerization 5-vinyl-2-norbornene containing 1 ppm to 0.5% by weight of 4-vinylcyclohexene in the presence of at least one catalyst selected from the group consisting of a solid base catalyst which is prepared by reacting alumina, an alkali metal hydroxide and an alkali metal in a temperature range of 200.degree. to 500.degree. C. and a solid base catalyst which is prepared by reacting water-containing alumina and an alkali metal in such an amount that exceeds a molar equivalent of water contained in alumina at a temperature in a range between a melting point of the alkali metal and 500.degree. C. in an inert gas atmosphere.

REFERENCES:
patent: 3577473 (1971-05-01), Nagase et al.
patent: 3808152 (1974-04-01), Nagase et al.
patent: 3897509 (1975-07-01), Nagase et al.

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