title: Capturing HBCy2: Using N,O-Chelated Complexes of Rhodium(I) and Iridium(I) for Chemoselective Hydroboration.
abstract: 1,3-N,O-chelated complexes of Rh(I) and Ir(I) 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.
authors: Department of Chemistry, The University of British Columbia, Vancouver, BC, V6T 1Z1, Canada.
authors: Marcus W
authors: MW
authors: Drover
authors: Department of Chemistry, The University of British Columbia, Vancouver, BC, V6T 1Z1, Canada. lschafer@chem.ubc.ca.
authors: Laurel L
authors: LL
authors: Schafer
authors: Department of Chemistry, The University of British Columbia, Vancouver, BC, V6T 1Z1, Canada. jenlove@chem.ubc.ca.
authors: Jennifer A
authors: JA
authors: Love
keywords: boranes; hemilability; hydroboration; iridium; rhodium