Reply to Correspondence on "Carbon-Centered Radical Addition to O=C of Amides or Esters as a Route to C-O Bond Formations".

A further understanding on carbon-centered radical addition to O=C to form C-O bonds is given. Several literature reports were illustrated to show the possibility of carbon-centered radical addition to O=C to form C-O bond. Generally, the ring-forming effect and a proper driving force to consume the formed cyclic carbon radical are required to achieve such a process.