Indolidenes and Indolidenium Intermediates in the Synthesis of Cyclopent[<i>b</i>]indoles: Mechanistic Studies on Intramolecular Cyclizations
作者:Ken S. Feldman、Inanllely Y. Gonzalez、Christopher M. Glinkerman
DOI:10.1021/acs.joc.5b01777
日期:2015.12.4
Tetracyclic products featuring predominantly a trans-hexahydroindane unit annelated onto the C(2)/C(3) positions of indole can be accessed by intramolecular cyclocondensation of tethered alkenyl sulfides with either indolidene or indolidenium cation intermediates. Studies with geometrically pure E- and Z-alkenyl sulfide isomers reveal a likely dichotomy of reaction paths that provide mixtures of both