Oxazoles formation during<i>O</i>-alkylation of isonitroso-naphthols. X-ray structure of [1,2]naphthoquinone 1-[<i>O</i>-(4-<i>tert</i>-butyl-benzyl)-oxime] and 2-(4-<i>tert</i>-butyl-phenyl)napth[1,2-<i>d</i>]oxazole
and in the presence of triethylamine affording, in low yields, the corresponding O-benzyl oximes and 2-aryl naphthoxazoles in a 1:1 ratio, approximately. The structures of O-benzyl oximes and naphthoxazoles isolated have been determined by X-ray analysis.