Visible light induced the high-efficiency spirocyclization reaction of propynamide and thiophenols via recyclable catalyst Pd/ZrO2  

作　　者：Nannan Zhang Hangdong Zuo Chen Xu Junyi Pan Jun Sun Cheng Guo 

机构地区：[1]College of Chemistry and molecular engineering,Nanjing Tech University,Nanjing 211816 China

出　　处：《Chinese Chemical Letters》2020年第2期337-340,共4页中国化学快报（英文版）

基　　金：financial support from Jiangsu Planned Projects for Postdoctoral Research Funds(No.2018K293C)。

摘　　要：A new method for the synthesis of 3-thioazaspiro[4,5]trienones was developed using Pd nanoparticle catalysts,which are highly efficient,environmentally friendly and recyclable.Alkynes and thiophene phenols are effectively cyclized by Pd/ZrO2 catalyst under visible light irradiation.The present protocol simply utilizes visible light as the safe and ecofriendly energy source,and the Pd/ZrO2 nanocomposite as photocatalyst provides a simple and practical approach to various 3-thioazaspiro[4,5]trienones in moderate conditions to high yields.A new method for the synthesis of 3-thioazaspiro[4,5]trienones was developed using Pd nanoparticle catalysts,which are highly efficient,environmentally friendly and recyclable.Alkynes and thiophene phenols are effectively cyclized by Pd/ZrO2 catalyst under visible light irradiation.The present protocol simply utilizes visible light as the safe and ecofriendly energy source,and the Pd/ZrO2 nanocomposite as photocatalyst provides a simple and practical approach to various 3-thioazaspiro[4,5]trienones in moderate conditions to high yields.

关 键 词：VISIBLE light SPIROCYCLIZATION reaction Mild condition Pd/ZrO2 nanocomposite photocatalyst 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] O621.251