The synthesis, characterization of three Schiff bases 3,3- dimethyl-5(phenylimino) cyclohexan-1-one [L1], [(4-chlorophenyl) imino]-3,3- dimethyl-5(phenylimino) cyclohexan-1-one [L2], and 3,3- dimethyl-5-[(4-nitrophenyl) imino]-3,3- dimethyl-5(phenylimino) cyclohexan-1-one [L3], derived by condensation of an equimolar amounts of dimedone with different amine such as aniline, 4- Chloroaniline and 4-nitroaniline in ethanol were reported . Spectroscopic techniques, including NMR (¹H and ¹³C), UV- vis spectroscopy, FT-IR, MS, and melting point were used to identify the products.