2-Acetylthiophene → 1-(Thiophen-2-yl)-3-(4-pyridinyl)-2-propene-1-one

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Reaction Steps

Dissolve anhydrous cobalt(II) acetate (700 mg, 4 mmol) in dimethylformamide (100 mL) . Add 2,2'-dipyridyl (600 mg, 4 mmol) and stir for 30 minutes. Add 2-acetylthiophene (6.3 g, 50 mmol) and 4-pyridinecarboxaldehyde (5 g, 50 mmol) and heat at 80° C. for 18 hours. Evaporate the solvent and purify the resiude by silica gel chromatography (1:1 toluene/ethyl acetate). Recrystallize (ethyl ether/hexane) to yield 120 mg of the title compound; mp 150.5°-152° C.

Provenance & Evidence