PBr<sub>3</sub>-Mediated Cyclization of 1,7-Diyn-3,6-bis(propargyl carbonate)s: Synthesis of 5-Bromotetracenes
作者:Ning Sun、Haoyi Chen、Xiangdong Li、Murong Xu、Yi Gan、Liangwei Zhang、Yuanhong Liu
DOI:10.1021/acs.joc.7b01519
日期:2017.10.6
A new and straightforward method for the synthesis of 5-bromotetracenes through PBr3-mediated cyclization of 1,7-diyn-3,6-bis(propargyl carbonate)s has been developed. This method offers several advantages such as easily accessible starting materials, high efficiency, and wide functional group compatibility. In addition, chloro- and iodo-substituted tetracenes were also synthesized using appropriate halogenating reagents. The utility of the 5-bromotetracene products has been illustrated by their efficient transformations through various palladium-catalyzed cross-coupling reactions.