Synthesis of a new iron tricarbonyl (η4) -α-pyrone complex by reaction of iron vinyldiketone complexes with methyllithium under a CO atmosphere

Article abstract of DOI:10.1016/S0022-328X(97)00487-7

The reaction between a new (η⁴)-trans-1,2-α,β-unsaturated diketone-Fe(CO)₃ complex derived from trans-1,2-dibenzoylethylene or the corresponding (η²)-Fe(CO)₄ complex with MeLi under a CO atmosphere leads to the formation of an (η⁴)-α-pyrone-Fe(CO)₃ complex 3 via the respective (η⁴)-ketene-Fe (O) complex. The structure of the complex was determined by mass spectrometry, IR, ¹H and ¹³C NMR spectroscopies and was confirmed by X-ray diffraction studies.