one was prepared by reaction of 5-acetylthiazole derivative 5 with the appropriate aldehyde 6a-e in ethanol in the presence of sodium hydroxide at room temperature (Scheme 1). The assigned structure 7 for the products was established by elemental analyses and spectral data (IR, 1 HNMR, MS). The IR spectra of compounds 7 showed in each case two absorption bands in the regions υ 1725-1724 and 1620-1608 cm -1 due to the carbonyl groups of the chromenone and enone residue. The 1 HNMR spectra exhibited two doublets in the regions δ 7.45-7.30 ppm assigned for the olefinic protons of the enone residue, in addition to the expected signals attributed to the methyl and aromatic protons. The mass spectra showed in each case a molecular ion peak that is in agreement with the molecular weight of the assigned structure.