title: Synthesis and Downstream Reactions of 2-(Triphenylphosphino)-4,5-dicarbomethoxy-1,3-diselenole Tetrafluoroborate: X-ray Crystal Structure of a Nitroso Derivative of a 2-Ylidene-1,3-diselenole Stabilized by an Intramolecular O.Se Interaction.
abstract: The title 1,3-diselenole Wittig reagent 9 has been synthesised by a new, efficient route from readily-available starting materials and reacted with a variety of functionalized aldehydes to form the corresponding 2-ylidene-1,3-diselenones 12 in respectable yields. X-ray analysis of a nitrosated derivative 14e, prepared by the reaction of 12e with isoamyl nitrite, has provided the first direct evidence for the stabilization of such systems by intramolecular oxygen-selenium interactions.
authors.affiliation: Laboratoire de chimie organique structurale, Université Montpellier II (MSTL) 340695 Montpellier Cedex 5, France.
authors.forename: Antony
authors.initials: A
authors.lastname: Chesney
authors.forename: Martin R.
authors.initials: MR
authors.lastname: Bryce
authors.forename: Michael A.
authors.initials: MA
authors.lastname: Chalton
authors.forename: Andrei S.
authors.initials: AS
authors.lastname: Batsanov
authors.forename: Judith A. K.
authors.initials: JA
authors.lastname: Howard
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Fabre
authors.forename: Laurent
authors.initials: L
authors.lastname: Binet
authors.forename: Saïd
authors.initials: S
authors.lastname: Chakroune