The condensation of 4-acetyltropolone with various arenecarbaldehydes gave a wide variety of 4-cinnamoyltropolone derivatives in good yield. The same reaction with 2-furaldehyde and cinnamaldehyde also afforded the corresponding 4-substituted tropolones. These products were converted to their oximes (with hydroxylamine hydrochloride), which in turn were hydro genated over 5% Pd/C in acetic acid and then acetylated with acetic anhydride, to yield 4-(1-acetamido-3-aryl-2-propenyl)tropolones. The catalytic hydrogenation of these olefinic products over 10–30% Pd/C in aqueous KOH gave various 4-(1-acetamido-3-arylpropyl)tropolones,which possess a B-ring-open structure of colchiceine. The structures of these products are discussed on the basis of UV, IR, and 1H-NMR spectra.