Synthesis of Unsymmetrical Diboranes by Diborane Metathesis

Anne-Frederique Pecharman, Michael Hill, Mary Mahon

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Reactions of readily accessible magnesium-centered pinacolatoboryl nucleophiles with [(Ph 2B) 2O] result in B−O bond activation of the diphenylborinic anhydride. Although [pinBBPh 2] is apparently generated when the nucleophilic boron unit is derived in situ from a magnesium diboranate, it cannot be isolated owing to its onward derivatization by a further {Bpin} equivalent. A reaction with a terminal magnesium boryl species similarly provides a boryloxide byproduct. In this case, however, the unsymmetrical B(sp 2)−B(sp 3) diborane may be intercepted as its DMAP adduct.

Original languageEnglish
Pages (from-to)10688-10691
Number of pages4
JournalAngewandte Chemie International Edition
Issue number33
Early online date6 Jun 2018
Publication statusPublished - 6 Aug 2018


  • boranes
  • boron
  • diboranes
  • magnesium
  • main group chemistry

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry


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