title: Cp*CoIII-Catalyzed Synthesis of Pyrido[2',1':2,3]pyrimido[1,6-a]indol-5-iums via Tandem C-H Activation and Subsequent Annulation from 1-(Pyridin-2-yl)-1H-indoles and Internal Alkynes.
abstract: A Cp*CoIII-catalyzed C2-selective C-H alkenylation/annulation cascade transformation of 1-(pyridin-2-yl)-1H-indoles with internal alkynes to afford pyrido[2',1':2,3]pyrimido[1,6-a]indol-5-iums is presented. Moreover, 6,7-dihydro-4H-pyrido[2',1':2,3]pyrimido[1,6-a]indole, a new functionalized N-fused indole core heterocycle, could be constructed effectively via reduction of pyrido[2',1':2,3]pyrimido[1,6-a]indol-5-ium by NaBH4.
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Yuhan
authors: Y
authors: Yang
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Bo
authors: B
authors: Li
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Wenmin
authors: W
authors: Liu
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Rumeng
authors: R
authors: Zhang
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Lintao
authors: L
authors: Yu
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Qin-Ge
authors: QG
authors: Ma
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Rongrong
authors: R
authors: Lv
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Donghua
authors: D
authors: Du
authors: College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University , Nanyang, Henan 473061, P. R. China.
authors: Ting
authors: T
authors: Li