title: Cu(OAc)2-Mediated Cascade Annulation of Diarylalkyne Sulfonamides through Dual C-N Bond Formation: Synthesis of 5,10-Dihydroindolo[3,2-b]indoles.
abstract: An unusual cascade reaction featuring annulation of diarylalkyne sulfonamides to form 5,10-dihydroindolo[3,2-b]indoles has been realized with Cu(OAc)2 as the sole oxidant. This unprecedented process encompasses two sequential C-N bond formations, allowing for an efficient synthesis of the biologically important indoloindole derivatives.
authors.affiliation: School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, P. R. China.
authors.forename: Junchao
authors.initials: J
authors.lastname: Yu
authors.affiliation: School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, P. R. China.
authors.forename: Daisy
authors.initials: D
authors.lastname: Zhang-Negrerie
authors.affiliation: School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, P. R. China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China.
authors.forename: Yunfei
authors.initials: Y
authors.lastname: Du