[EN] TRICYCLIC COMPOUNDS USEFUL FOR THE TREATMENT OF INFLAMMATORY AND ALLERGIC DISORDERS: PROCESS FOR THEIR PREPARATION [FR] COMPOSES TRICYCLIQUES UTILES DANS LE TRAITEMENT DE TROUBLES INFLAMMATOIRES ET ALLERGIQUES, ET PROCEDE DE PREPARATION DE CES COMPOSES
An efficient and facile method for the synthesis of a broad series of benzofurans and naphthofurans is described. The direct intramolecular cyclodehydration of aryloxyketones in the presence of titaniumtetrachloride affords the corresponding benzofurans and naphthofurans with good regioselectivity and yields.