4.7 Article

Synthesis and reactivity of boryloxorhodium complexes. Relevance to intermolecular transmetalation from boron to rhodium in Rh-catalyzed reactions

Journal

DALTON TRANSACTIONS
Volume 50, Issue 10, Pages 3610-3615

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt00440a

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Funding

  1. Ministry of Education, Culture, Sports, Science and Technology, Japan [13740412, 11166221]
  2. Grants-in-Aid for Scientific Research [13740412, 11166221] Funding Source: KAKEN

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A novel dimeric boryloxorhodium complex was synthesized and used as a catalyst for the addition reaction of arylboronic acid to cyclohexene-2-one through transmetalation.
The synthesis of a dimeric boryloxorhodium complex having the Rh-O-Bpin scaffold from the reaction of [(cod)Rh(OMe)](2) or [(cod)Rh(OH)](2) with an arylboronate has been achieved. The obtained dirhodium complex is converted into mononuclear complex [(cod)Rh(OBpin)(PPh3)], which reacts with arylboronic acid to afford the complex with an Rh-aryl bond via transmetalation from boron to rhodium. The dimeric boryloxorhodium complex catalyzes the 1,4-addition of arylboronic acid to cyclohexene-2-one.

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