title: Intramolecular cyclizations of cyclopropenes with indole.
abstract: Novel intramolecular cycloisomerizations of nitrogen-tethered cyclopropenes with indole in the presence of Brønsted acids have been developed. The reactions proceeded through the same pathway but stopped at different stages according to different substituent styles, affording azocino[5,4-b]indole 2 and (epiminoethano)cyclopenta[b]indole 4 in moderate to good yields.
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road No. 130, Shanghai, 200237, China.
authors.forename: Peng-Long
authors.initials: PL
authors.lastname: Zhu
authors.forename: Xiang-Ying
authors.initials: XY
authors.lastname: Tang
authors.forename: Min
authors.initials: M
authors.lastname: Shi