Catalytic phenylborylation reaction by iridium(0) nanoparticles produced from hydridoiridium carborane.
Well-dispersed iridium(0) nanoparticles stabilized with the ionic liquid, trihexyltetradecylphosphonium methylsulfonate, [THTdP][MS], have been successfully prepared by reduction of the precursor hydridoiridium carborane, (Ph 3P) 2Ir(H)(7,8- nido-C 2B 9H 11). The iridium nanoparticles were found to be active catalysts for arylborylation, forming boric acids. The activity of the catalyst has been investigated as a function of the activating base, and reaction conditions. The highest yield of 91% was achieved in a microwave reactor using the base, tetra-2-pyridinylpyrazine, in the presence of [THTdP][MS]. The catalytic system could be recycled at least six times with less than a 0.5% loss of activity.
Yinghuai
Zhu
Z
Institute of Chemical and Engineering Sciences Ltd, 1 Pesek Road, Jurong Island, Singapore. zhu_yinghuai@ices.a-star.edu.sg
Chenyan
Koh
K
Peng
Ang Thiam
AT
Emi
A
A
Monalisa
Winata
W
Kui-Jin Louis
Loo
L
Hosmane
Narayan S
NS
Maguire
John A
JA
D001880:Boranes / Q000737:chemistry*; D001888:Boric Acids; D002384:Catalysis; D007495:Iridium / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*
D001880:Boranes; D001888:Boric Acids; D007495:Iridium