Efficient Synthesis of Functionalized Alkylidenephthalides, Butenolides, Pyranones, and Isocoumarins via I₂–PPh₃: Synthesis of Thunberginols A and F

A simple and efficient synthesis of functionalized alkylidenephthalides, butenolides, pyranones, and isocoumarins were achieved using I2-PPh3-Et3N reagent combination. The products obtained through this methods act as versatile components in organic...