Uncatalyzed Carboboration of Seven-Membered-Ring trans-Alkenes: Formation of Air-Stable Trialkylboranes

Jillian R. Sanzone, Chunhua T. Hu, K. A. Woerpel

Research output: Contribution to journalArticlepeer-review


Seven-membered-ring trans-alkenes undergo rapid, uncatalyzed carboboration reactions to form trialkylboranes as single diastereomers. In contrast with other trialkylboranes, which can ignite in the presence of oxygen, these trialkylboranes are stable in air. Hindered trialkylboranes can undergo reverse hydroboration reactions to form allylic silanes or can be oxidized to afford highly substituted triols. This reaction sequence permits the construction of compounds with up to five consecutive stereocenters. Control experiments and computational studies support a concerted mechanism for the migratory insertion of the alkene into the carbon-boron bond, similar to the mechanism for hydroboration.

Original languageEnglish (US)
Pages (from-to)8404-8407
Number of pages4
JournalJournal of the American Chemical Society
Issue number25
StatePublished - Jun 28 2017

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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