title: Base-mediated insertion reaction of alkynes into carbon-carbon σ-bonds of ethanones: synthesis of hydroxydienone and chromone derivatives.
abstract: Transition-metal free insertions of alkynes into carbon-carbon σ-bonds of ethanones have been reported. These tandem reactions offer an efficient synthesis of hydroxydienones and multi-substituted chromones. This is the first example of base-promoted insertion reactions of isolated carbon-carbon triple bonds into carbon-carbon σ-bonds with active methylene compounds bearing only one electron-withdrawing group.
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China. yzli@chem.ecnu.edu.cn.
authors.forename: Fangfang
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China. yzli@chem.ecnu.edu.cn.
authors.forename: Qiyi
authors.initials: Q
authors.lastname: Yao
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China. yzli@chem.ecnu.edu.cn.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China. yzli@chem.ecnu.edu.cn.
authors.forename: Murong
authors.initials: M
authors.lastname: Xu
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China. yzli@chem.ecnu.edu.cn.
authors.forename: Lingkai
authors.initials: L
authors.lastname: Kong
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China. yzli@chem.ecnu.edu.cn.
authors.forename: Yanzhong
authors.identifier: http://orcid.org/0000-0002-2898-3075
authors.initials: Y
authors.lastname: Li