Improved Radical Approach to N-Unsubstituted Indol-2-one and Dihydro-2-quinolinone Compounds Bearing Spirocyclic Cyclohexanone/Cyclohexadienone Rings

N-Unsubstituted indol-2-one and 3,4-dihydro-2-quinolinone compounds bearing spirocyclic cyclohexanone/cyclohexadienone rings can be accessed through a novel, improved method entailing the key radical spirocyclization of easily accessible N-methoxymethyl (MOM)-protected 2-iodoanilides derived from 4-azidobenzoic and 2-(4-azidophenyl) acetic acid.