title: B(C₆F₅)₃ promoted cyclisation of internal propargyl esters: structural characterisation of 1,3-dioxolium compounds.
abstract: The reactions of internal propargyl esters with B(C6F5)3 provide access to stable zwitterionic 1,3-dioxolium compounds which are characterised by X-ray diffraction. These 6π-electron systems show no significant aromatic stabilisation.
authors.affiliation: Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany. hashmi@hashmi.de.
authors.forename: Max M
authors.initials: MM
authors.lastname: Hansmann
authors.forename: Rebecca L
authors.initials: RL
authors.lastname: Melen
authors.forename: Frank
authors.initials: F
authors.lastname: Rominger
authors.forename: A Stephen K
authors.initials: AS
authors.lastname: Hashmi
authors.forename: Douglas W
authors.initials: DW
authors.lastname: Stephan