A step-economical method for the cascade cyclization of 1,7-enynes with aromatic sulfonyl chlorides by using a low-cost and more abundant Cu catalyst is presented. This method allows access to benzo[j]phenanthridin-6(5H)-ones and represents a new Cu-catalyzed cascade cyclization of 1,n-enynes.
![Graphical abstract: Copper-catalyzed cascade cyclization of 1,7-enynes with aromatic sulfonyl chlorides toward selective assembly of benzo[j]phenanthridin-6(5H)-ones](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C4CC06913G&imageInfo.ImageIdentifier.Year=2014)
Y. Liu, J. Zhang, M. Zhou, R. Song and J. Li, Chem. Commun., 2014, 50, 14412 DOI: 10.1039/C4CC06913G
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