Abstract 2-Aryl-4-methyl-5-acetylthiazoles, which were prepared from arylthioamides and chloroacetylacetone, were treated with 6-substituted-3-formylchromones or arylaldehydes to give a series of eighteen new thiazolylchalcones in good yields. The structures of all the synthesized compounds were characterized by 1 H NMR, 13 C NMR, and ES-MS spectrometry. Additionally, the crystal structures of two of these chalcones were ...