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Autori: A. C. Razus, N. M. Surugiu, L. Cristian, A. Negoiescu, O. Zaharia, L. Birzan
Editorial: Revue Roumaine de Chimie, 51(7-8), p.601-8, 2006.
The reaction of azulenes with phthalic and naphthalene-1,8-dicarboxylic acid derivatives was investigated. Working with acids chlorides in the presence of Lewis acids (SnCl4 and AlCl3) the obtained products were gem-di-(azulen-1-yl)-lactones, di-(1-azulenyl) ketones and (1-azulenoyl)-carboxylate acids. The reaction of phthalic anhydride in the same conditions occured with low yields affording only corresponding lactone whereas the naphthalic anhydride was recovered unreacted. The Vilsmeyer reaction of azulenes with both diamides failed. The reaction route starting from the dichloride was discussed.
Cuvinte cheie: azulene, ftalide, naftalide // azulene, phthalides, naphthalides