title: Double FLP-Alkyne Exchange Reactions: A Facile Route to Te/B Heterocycles.
abstract: 1-Bora-4-tellurocyclohexa-2,5-diene undergoes sequential [4 + 2] cycloadditions/alkyne-elimination reactions to incorporate 2 equiv of terminal alkyne with the loss of diarylalkyne, affording access to a series of 11 new tellurium-boron heterocycles. These alkyne exchange reactions proceed regioselectively and can tolerate a variety of functional groups, thus providing the potential for further derivatization. The mechanism of the exchange reaction is confirmed by a DFT study to involve the interaction of the Te and B with the alkyne in a frustrated Lewis pair fashion in the transition states.
authors.affiliation: Department of Chemistry, University of Toronto , 80 St. George St., Toronto, Ontario Canada M5S 3H6.
authors.forename: Fu An
authors.initials: FA
authors.lastname: Tsao
authors.affiliation: Department of Chemistry, University of Toronto , 80 St. George St., Toronto, Ontario Canada M5S 3H6.
authors.forename: Levy
authors.initials: L
authors.lastname: Cao
authors.affiliation: Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie , Universität Bonn Beringstr. 4, 53115 Bonn, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Grimme
authors.affiliation: Department of Chemistry, University of Toronto , 80 St. George St., Toronto, Ontario Canada M5S 3H6.
authors.forename: Douglas W
authors.initials: DW
authors.lastname: Stephan