title: Intramolecular [3 + 2] cyclocondensations of alkenes with indolidenes and indolidenium cations.
abstract: C(2)-C(3) cyclopentannelated indole constructs are prepared by either (a) a cyclization cascade of an alkenyl sulfide tethered to a 2-azido-1-allenylbenzene core or (b) cationic cyclization of a tethered alkenyl sulfide with a putative 2-indolidenium cation. In both cases, issues of C-C versus C-N bond formation emerge, and the results indicate that the former is favored.
authors.affiliation: Department of Chemistry, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Ken S
authors.initials: KS
authors.lastname: Feldman
authors.forename: Inanllely Y
authors.initials: IY
authors.lastname: Gonzalez
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Glinkerman