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Capturing HBCy2: Using N,O-Chelated Complexes of Rhodium(I) and Iridium(I) for Chemoselective Hydroboration

TitleCapturing HBCy2: Using N,O-Chelated Complexes of Rhodium(I) and Iridium(I) for Chemoselective Hydroboration
Publication TypeJournal Article
Year of Publication2016
AuthorsDrover, MW, Schafer, LL, Love, JA
JournalAngewandte Chemie International Edition
Volume55
Pagination3181–3186
ISSN1521-3773
Keywordsboranes, hemilability, hydroboration, IRIDIUM, rhodium
Abstract

1,3-N,O-chelated complexes of RhI and IrI cooperatively and reversibly stabilized the B−H bond of HBCy2 to afford six-membered metallaheterocycles (M=Rh (7) or Ir (8)) having a δ-[M]⋅⋅⋅H-B agostic interaction. Treatment of these Shimoi-type borane adducts 7 or 8 with both an aldehyde and an alkene resulted in chemoselective aldehyde hydroboration and reformation of the 1,3-N,O-chelated starting material. The observed chemoselectivity is inverted from that of free HBCy2, which is selective for alkene hydroboration.

URLhttp://dx.doi.org/10.1002/anie.201511448
DOI10.1002/anie.201511448