title: Lewis Acid Catalyzed [4 + 3] Cycloaddition of Propargylic Alcohols with Azides.
abstract: An unprecedented Lewis acid catalyzed [4 + 3] cycloaddition reaction is described that provides a straightforward route to polycyclic products containing an imine-based indole azepine scaffold, starting from readily available internal tertiary alkynols and azides. This cycloaddition protocol provides efficient and atom-economical access to a new class of fascinating imine-containing products in satisfactory yields, which has shown good application in the construction of seven-membered N-heterocycles.
authors: State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China.
authors: Ya-Ping
authors: YP
authors: Han
authors: Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science Technology Normal University , Nanchang 330013, China.
authors: Xian-Rong
authors: XR
authors: Song
authors: State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China.
authors: Yi-Feng
authors: YF
authors: Qiu
authors: State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China.
authors: Heng-Rui
authors: HR
authors: Zhang
authors: State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China.
authors: Lian-Hua
authors: LH
authors: Li
authors: State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China.
authors: Dong-Po
authors: DP
authors: Jin
authors: State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China.
authors: Xiao-Qing
authors: XQ
authors: Sun
authors: State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China.
authors: Xue-Yuan
authors: XY
authors: Liu
authors: State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China.|State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China.
authors: Yong-Min
authors: YM
authors: Liang