4.7 Article

Coinage metal amido and thiolate SNS complexes: consequences of catalyst speciation in Cu(i)-catalysed carbonyl hydroboration

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CHEMICAL COMMUNICATIONS
卷 59, 期 27, 页码 4044-4046

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc06077a

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Three new IPr-Ag- and -Au-SNS amido and thiolate complexes were synthesized and compared to their previously reported Cu analogues as carbonyl hydroboration catalysts. Although these complexes showed no catalytic activity, treatment of the IPr-Ag-SNS amido complex with pinacolborane released N-borylated ligand, (SNSMe)-N-Me-S-Bpin, (L-1-Bpin). This finding led to reinvestigation of the IPr-Cu-SNS amido precatalyst, revealing immediate conversion of the catalyst system to [CuH(IPr)](2) upon loss of L-1-Bpin.
Three new IPr-Ag- and -Au-SNS amido and thiolate complexes were synthesized and compared to their previously reported Cu analogues as carbonyl hydroboration catalysts (IPr = bis(2,6-diisopropylphenyl)imidazol-2-ylidene). Although these complexes showed no catalytic activity, treatment of the IPr-Ag-SNS amido complex with pinacolborane released the N-borylated ligand, (SNSMe)-N-Me-S-Bpin, (L-1-Bpin). This finding led us to reinvestigate the IPr-Cu-SNS amido precatalyst, revealing that immediate loss of L-1-Bpin converts our catalyst system to [CuH(IPr)](2).

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