Novel rhodium complexes containing a bulky iminophosphine ligand and their use as catalysts for the hydroboration of vinylarenes
摘要:
Addition of o-Ph2PC6H4CH=N-2,6-(Pr2C6H3)-Pr-i (1) to [RhCl(coe)(2)](2) (coe = cis-cycloctene) gave several new iminophosphino rhodium(I) complexes including [Rh(kappa(2)-o-Ph2PC6H4CH=N-2,6-(Pr2C6H3)-Pr-i)(mu-Cl)](2) (2). Addition of 1 to Rh(acac)(coe)(2) (acac = acetylacetonato) gave [Rh(acac)(kappa(2)-o-Ph2PC6H4CH=N-2,6-(Pr2C6H3)-Pr-i)] (3) in yields of up to 75%. Complex 3 has been examined for its ability to catalyze the hydroboration of a series of vinyl arenes. Reactions using catecholborane and pinacolborane seem to proceed largely through a dehydrogenative borylation mechanism to give a number of boronated products. (c) 2005 Elsevier B.V. All rights reserved.
Novel rhodium complexes containing a bulky iminophosphine ligand and their use as catalysts for the hydroboration of vinylarenes
摘要:
Addition of o-Ph2PC6H4CH=N-2,6-(Pr2C6H3)-Pr-i (1) to [RhCl(coe)(2)](2) (coe = cis-cycloctene) gave several new iminophosphino rhodium(I) complexes including [Rh(kappa(2)-o-Ph2PC6H4CH=N-2,6-(Pr2C6H3)-Pr-i)(mu-Cl)](2) (2). Addition of 1 to Rh(acac)(coe)(2) (acac = acetylacetonato) gave [Rh(acac)(kappa(2)-o-Ph2PC6H4CH=N-2,6-(Pr2C6H3)-Pr-i)] (3) in yields of up to 75%. Complex 3 has been examined for its ability to catalyze the hydroboration of a series of vinyl arenes. Reactions using catecholborane and pinacolborane seem to proceed largely through a dehydrogenative borylation mechanism to give a number of boronated products. (c) 2005 Elsevier B.V. All rights reserved.