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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 20mol % of Triton X-100 in water solvent is sufficient. The FT-IR, 19 F NMR, 1 H NMR, 13 C NMR spectra...