An Improved Method for the Synthesis of Carbazolones by Palladium/ Copper-Catalyzed Intramolecular Annulation of TV-Arylenaminones

摘要

An improved method for the synthesis of carbazolones via the condensation of arylamines with 1,3-cyclodiketones followed by intramolecular oxidative cyclization catalyzed by palladium acetate and copper acetate in ethanol under an oxygen atmosphere was established. The improved method has the advantage of easily available starting materials and affords good yields.