Capturing HBCy2: Using N,O-Chelated Complexes of Rhodium(I) and Iridium(I) for Chemoselective Hydroboration
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.
Drover, Marcus W.,Schafer, Laurel L.,Love, Jennifer A.
The present invention relates to new dialkylborane amine complexes, a process for the synthesis of new dialkylborane amine complexes, solutions comprising new dialkylbo- rane amine complexes and a method of using new dialkylborane amine complexes for organic reactions.
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(2008/12/05)
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