title: Copper-promoted [2+2+2] annulation of 1,n-enynes through decomposition of azobis(alkyl nitrile)s.
abstract: A novel copper-promoted [2+2+2] annulation of 1,n-enynes with azobis(alkyl nitrile)s and H2O for the synthesis of diverse 7,8-dihydrophenanthridine-6,9(5H,6aH)-diones and fluorene is described. The reaction proceeds via the decomposition of azobis(alkyl nitrile)s into the cyanoalkyl radicals as the two-carbon units and offers a new efficient tool for the one-step formation of four new chemical bonds.
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China. jhli@hnu.edu.cn and Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.
authors.forename: Bang
authors.initials: B
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China. jhli@hnu.edu.cn and Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.
authors.forename: Cheng-Yong
authors.initials: CY
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China. jhli@hnu.edu.cn and Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China. jhli@hnu.edu.cn and Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.
authors.forename: Ren-Jie
authors.initials: RJ
authors.lastname: Song
authors.affiliation: College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China. fanchen@wzu.edu.cn.
authors.forename: Fan
authors.initials: F
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China. jhli@hnu.edu.cn and Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.
authors.forename: Jin-Heng
authors.identifier: http://orcid.org/0000-0001-7215-7152
authors.initials: JH
authors.lastname: Li