Synthesis of unsymmetrical benzils using N-heterocyclic carbene catalysis
作者:Yumiko Suzuki、Abu Bakar、Takashi Tanoi、Naoko Nomura、Masayuki Sato
DOI:10.1016/j.tet.2011.04.020
日期:2011.6
In this paper, we propose a novel and efficient method for the preparation of various unsymmetricalbenzils. We first demonstrate the nucleophilic aroylation of N-phenylbenzimidoyl chlorides with aromatic aldehydes using N-heterocyclic carbene as the catalyst to afford 1-aryl-2-phenyl-2-(phenylimino)ethanones. These iminoethanones were then converted to 1,2-diaryl-1,2-diketones by acid-promoted hydrolysis