Sur l'orientation de la nitration des nitriles et amides coumariliques Bz-méthoxylés

Direct nitrations of 2-carboxamido- and 2-cyano-Bz-methoxybenzofurans by nitric acid in acetic anhydride always yiels two derivatives nitrated on the homocyclic ring at the ortho or, possibly, the para position to the methoxyl group. The proportions vary with the case in question. The methoxylated nitrocarboxamides and nitronitrilies obtained can be demethylated nitrocarboxamides and nitronitriles obtained can demethylated by pridinium chloride. Their hydrokysis into the corresponding acids is performed without demethylation by diluted sulfuric acid and, except in one case, with simulatenous demethylation by dilued soda.