The acidity of the reaction medium is known to influence the orientation of substitution products of many amines (1, 2, 3, 4, 5, 6, 7) and their derivatives, particularly anilides and sulphonamides (8, 9, 10, 11). Derivatives of 2,6-dimethylaniline (m-2-xylidine) have proved to be of more than
