The luminescence is appreciably enhanced when the hydroxyl or amine groups are in the ortho position. The efficiency of chromogenic sensing is more remarkably affected by the chemical environment of the anthranilic acid derivatives, depending on the presence of a protecting free amino group or amide group. Taking into account these considerations, it is possible to optimize the uv-vis sensing of the molecules by structure modification. Keeping the above applications in mind, we have investigated the synthesis and characterization of a series of 2,6-and 2,3-diamino benzoic methyl esters derivatives with various electron-donor groups at the 2,6-or 2,3-positions.