Ferrocenyl iminophosphine ligands in Pd-catalysed Suzuki couplings
摘要:
A mixture of Pd-2(dba)(3)/{eta-C5H4CH=N[CH(CH3)(Nap)]}Fe[eta-C5H4P(Bu-t)(2)] efficiently catalyzes the Suzuki reactions of a variety of bulky aryl halides and aryl- and alkyl-boronic acids, affording the desired cross-coupling biaryl products in quantitative isolated yields under mild conditions and at low (1 x 10(-6) -1 mol%) Pd loadings. Spectroscopic (NMR & ESI) analysis of the mixture of Pd-2(dba)(3), the hybrid [P,N] ligands, and aryl halides revealed different structural forms of oxidative addition products that are dependent on the substituent on the imino nitrogen. (C) 2011 Elsevier B.V. All rights reserved.
Ferrocenyl iminophosphine ligands in Pd-catalysed Suzuki couplings
摘要:
A mixture of Pd-2(dba)(3)/{eta-C5H4CH=N[CH(CH3)(Nap)]}Fe[eta-C5H4P(Bu-t)(2)] efficiently catalyzes the Suzuki reactions of a variety of bulky aryl halides and aryl- and alkyl-boronic acids, affording the desired cross-coupling biaryl products in quantitative isolated yields under mild conditions and at low (1 x 10(-6) -1 mol%) Pd loadings. Spectroscopic (NMR & ESI) analysis of the mixture of Pd-2(dba)(3), the hybrid [P,N] ligands, and aryl halides revealed different structural forms of oxidative addition products that are dependent on the substituent on the imino nitrogen. (C) 2011 Elsevier B.V. All rights reserved.