Tetrahedron Letters p. 3563 - 3566 (1993)
Update date:2022-09-26
Topics:
Saitoh, Masaki
Hashimoto, Keitaro
Nakazawa, Tomoo
Sugihara, Yoshikazu
Substituted di-1-azulenyl ketones composed of 3,8-dimethyl-5-isopropyl-1-azulenyl and/or 4,6,8-trimethyl-1-azulenyl group were refluxed in ethanol in the presence of p-toluenesulfonic acid to give substituted azulenes and ethyl azulene-1-carboxylates derived from the cleavage of either of C-CO bonds of di-1-azulenyl ketones.The facility and the product distributions of the ethanolysis were affected markedly by the substitutents.
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