摘要:
AbstractA visible‐light‐promoted metal‐free carboxylative cyclization of propargylic amines with CO2 was shown to offer exo‐iodomethylene 2‐oxazolidinones. Incorporation of both CO2 and iodo moieties into these compounds was realized efficiently. The mechanism study revealed that this carboxylative cyclization proceeds through a radical pathway. Notably, the iodine‐functionalized 2‐oxazolidinone as a platform molecule could be easily converted into a wide range of value‐added chemicals through Buchwald–Hartwig, Suzuki, Sonogashira, photocatalytic ene, and photoreduction reactions. As a result, the plentiful downstream transformations remarkably enhance the range of chemicals derived from CO2 and open a potential avenue for CO2 functionalization to circumvent energy challenges in this field.