The First OCCCO Pentadentate Chelates:Osmium Mediated Stepwise Oxidations of Terminal Alkynes by Pyridine N-Oxide

查看全文 作　　者：Jianfeng [1,2]Lin;Qiannan [1]Xu;Xinlei [1]Lin;Yuhui [1]Hua;Dafa [2]Chen;Yonghong [1]Ruan;Hong [1]Zhang;Haiping [1,2]Xia

机构地区：[1]College of Chemistry and Chemical Engineering,Xiamen University,Xiamen,Fujian 361005,China;[2]Shenzhen Grubbs Institute,Department of Chemistry,Guangdong Provincial Key Laboratory of Catalysis,Southern University of Science and Technology,Shenzhen,Guangdong 518055,China

出　　处：《Chinese Journal of Chemistry》索引2020年第38卷第11期,共7页

基　　金：We gratefully acknowledge the Guangdong Provincial Key Laboratory of Catalysis(No.2020B121201002);NSFC(Nos.U1705254 and 21931002)for their financial support. 摘　　要：of main observation and conclusion Oxygen atom transfer reactions between alkynes and heteroarene N-oxides are currently mediated by transition metal,such as gold,ruthenium or rhodium,but they have never been catalyzed by osmium.Herein,we report stepwise oxidations of terminal alkynes mediated by an osmium carbolong complex,using pyridine N-oxide as the oxidant,yielding novel aldehyde-or carboxylic acid-coordinated osmapentalyne derivatives selectively.The mechanism was illustrated by density functional theory calculations,providing a new route for oxygen atom transfer between heteroarene N-oxides and alkynes. 关键词：oxides YIELDING CONCLUSION

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The First OCCCO Pentadentate Chelates:Osmium Mediated Stepwise Oxidations of Terminal Alkynes by Pyridine N-Oxide

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