title: Indole Synthesis via Cobalt(III)-Catalyzed Oxidative Coupling of N-Arylureas and Internal Alkynes.
abstract: A mild Co(III)-catalyzed oxidative annulation of N-arylureas and internal alkynes has been developed. The use of less electrophilic ureas other than acetamides as directing groups is crucial for the reaction. A broad range of synthetically useful functional groups are compatible with this reaction, thus providing a new opportunity for the synthesis of diverse indoles.
authors.affiliation: Department of Chemistry, Zhejiang University , Hangzhou 310027, China.
authors.forename: Zhuo-Zhuo
authors.initials: ZZ
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Zhejiang University , Hangzhou 310027, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Zhejiang University , Hangzhou 310027, China.
authors.forename: Jing-Wen
authors.initials: JW
authors.lastname: Xu
authors.affiliation: Department of Chemistry, Zhejiang University , Hangzhou 310027, China.
authors.forename: Sheng-Yi
authors.initials: SY
authors.lastname: Yan
authors.affiliation: Department of Chemistry, Zhejiang University , Hangzhou 310027, China.
authors.forename: Bing-Feng
authors.initials: BF
authors.lastname: Shi