Synthesis 2010(17): 2926-2930  
DOI: 10.1055/s-0030-1258141
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

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

Bojie Weng, Rui Liu, Jing-Hua Li*
College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. of China
e-Mail: lijh@zjut.edu.cn;
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Publikationsverlauf

Received 8 January 2010
Publikationsdatum:
30. Juni 2010 (online)

Abstract

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.