Copper-Catalyzed Tandem Amide<i>N</i>-Arylation and Regioselective Cyclization of 2-Alkynylbenzamides
作者:Hideki Minami、Takuya Sueda、Noriko Okamoto、Yoshihisa Miwa、Minoru Ishikura、Reiko Yanada
DOI:10.1002/ejoc.201501330
日期:2016.1
stable 2-alkynylbenzamides was developed by using a tandem copper-catalyzed N-arylation and regioselective 6-endo-dig cyclization in the presence of diaryliodonium salts, a copper catalyst, and 2,6-di-tert-butylpyridine. The arylation occurred at the nitrogen atom rather than the oxygen atom of the amide group, the alkynyl carbon, or the benzene ring of the benzamide. Cyclization occurred through a preferential
Highly Efficient Access to Iminoisocoumarins and α-Iminopyrones via AgOTf-Catalyzed Intramolecular Enyne−Amide Cyclization
作者:Ming Bian、Weijun Yao、Hanfeng Ding、Cheng Ma
DOI:10.1021/jo9023478
日期:2010.1.1
Iminoisocoumarins and alpha-iminopyrones are prepared via Sonogashira coupling and AgOTf-catalyzed 6-endo-dig O-cyclization of the enyne-amide system in dichloroethane, in one pot or stepwise, respectively.