I2/PPh3‐Mediated Cyclization of Enaminones with Sodium Sulfinates: A Protocol for the Synthesis of 3‐Thiolated Chromones

Abstract An I 2 /PPh 3 ‐mediated synthesis of 3‐thiolated chromones starting from 2‐hydroxyphenylenones and sodium sulfinates was reported. This method features one pot manner, metal‐free, easy performance, readily available starting materials and illustrating potential value for some biologically or pharmaceutically active compounds. In addition, a possible mechanism was proposed based on the control experiments.