Preparation of polyalkylated cyclopentadienes from isobornyl car

Details Preparation of polyalkylated cyclopentadienes from isobornyl car Preparation of polyalkylated cyclopentadienes from isobornyl car

1995-04-26

1997-07-15

Caldarola, Glenn A.

Chemistry of hydrocarbon compounds

Alicyclic compound synthesis

Adamantane or derivative

585357, C07C 1328, C07C 120

Patent

active

056485786

ABSTRACT:
A process for preparing tetraalkylated cyclopentadienes comprises (a) pyrolyzing an isobornyl carboxylate so as to form a mixture of 1,2,3- and 1,2,4-trimethylcyclopentadienes, (b) alkylating said mixture with an alkylating agent so as to form a mixture of alkyltrimethylcyclopentadiene isomers including 1,2,3,4-alkyltrimethylcyclopentadiene and, (c) thermally isomerizing the mixture of isomers obtained in step (b) so as to increase the proportion of 1,2,3,4-alkyltrimethylcyclopentadiene in said mixture of isomers.

REFERENCES:
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patent: 4814532 (1989-03-01), Yoshida et al.
patent: 5329056 (1994-07-01), Belmont
De Haan, J. W., et al., Recuel, 1968, 87, 289-297 no month available.
Mironov, V.A., et al., Russ. Chem. Rev., 1981, 50, 666-679 no month avialable.

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