Résumé A facile and efficient synthesis of hexahydroquinoline derivatives (5a–o) was reported via a four-component condensation reaction of aldehydes, dimedone, methyl aceto acetate and ammonium acetate in the presence of Triton X-100 in water at room temperature. The use of just 20 mol % of Triton X-100 in water solvent is sufficient. The FT-IR, 19F NMR, 1H NMR, 13C NMR spectra and elemental analysis confirm the structure of the compounds.