1113009-64-5Relevant academic research and scientific papers
PBr3-mediated cyclization of 1,7-diyn-3,6-bis(propargyl carbonate)s: Synthesis of 5-bromotetracenes
Sun, Ning,Chen, Haoyi,Li, Xiangdong,Xu, Murong,Gan, Yi,Zhang, Liangwei,Liu, Yuanhong
, p. 10051 - 10061 (2018/05/31)
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.
Highly efficient Bronsted acid-catalyzed cycloisomerizations of alkynes bearing bis(acetoxy) groups to indenyl ketones
Liu, Yuanhong,Zhou, Shaolin,Li, Guijie,Yan, Bin,Guo, Shenghai,Zhou, Yebing,Zhang, Hao,Wang, Peng George
supporting information; body text, p. 797 - 801 (2009/04/08)
A Bronsted acid-catalyzed cycloisomerization of functionalized alkynes is described, which is assumed to be initiated through the formation of a benzylic cation intermediate. The reaction offers a highly efficient and straightforward route to indenyl ketones with a wide range of substituents under mild conditions.
