Synthesis of α-pyrones by catalytic oxidative coupling of terminal alkynes and carbon dioxide

Article abstract of DOI:10.1016/j.jorganchem.2016.12.033

The use of the complex [(dippe)Ni(μ-H)]₂(1) as a catalyst precursor (10?mol%) in the presence of a variety of terminal alkynes and CO₂allowed the production of substituted α–pyrones. This reaction occurs using relatively mild conditions (50?°C, 150 psi of CO₂) with good to modest yields, depending on the nature of the substituents in the corresponding alkyne. The produced α–pyrones were characterized by different analytical methods and spectroscopic techniques.