Volume 108, Issue 12 pp. 437-440
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Synthesis of 3-methyl-, 4-methyl- and 3,4-dimethylcyclopenta[cd]pyrenes

E. R. Kellenbach

E. R. Kellenbach

Gorlaeus Laboratories, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands

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J. Lugtenburg

J. Lugtenburg

Gorlaeus Laboratories, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands

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J. Cornelisse

J. Cornelisse

Gorlaeus Laboratories, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands

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First published: 1989
Citations: 3

Abstract

A convenient synthesis of three cyclopenta[ad]pyrene derivatives methylated on the five-membered ring is described. The starting materials were easily available ketones which were either Wolff-Kishner-reduced or treated with methyllithium followed by dehydration with p-toluene-sulfonic acid to give the partially saturated derivatives. Careful aromatization with DDQ gave the novel methylated compounds in reasonable yields.

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