C−C Coupling Reactivity of an Alkylgold(III) Fluoride Complex with Arylboronic Acids
作者:Neal P. Mankad、F. Dean Toste
DOI:10.1021/ja106257n
日期:2010.9.22
alkylgold(III) fluorides have been proposed as catalytic intermediates that undergo C-C coupling with reagents such as arylboronic acids in Au(I)/Au(III) cross-coupling reactions. Here is reported the first experimental evidence for this elementary mechanistic step. Complexes of the type (NHC)AuMe (NHC = N-heterocyclic carbene) were oxidized with XeF(2) to yield cis-(NHC)AuMeF(2) products, which were found to be
The study of perfluoroalkyl metal complexes is key to understand and improve metal-promoted perfluoroalkylation reactions. Herein, we report the synthesis of the first goldcomplexes with primary or secondary perfluoroalkyl ligands by photoinitiated reactions between AuI organometallic complexes and iodoperfluoroalkanes. Complexes of the types LAuRF (L=PPh3 or N,N-bis(2,6-diisopropylphenyl)imidazol-2-ylidene;
AbstractThe first binuclear AuI compounds containing bridging (CF2)n chains (n=4, 6, 8) and AuIII metallaperfluorocyclopentanes have been obtained by photoinitiated reactions of LAuMe (L=PPh3, PMe3, PCy3, or IPr) with α,ω‐diiodoperfluorocarbons. Complexes LAu(CF2)4AuL present an unusual looped structure stabilized by an aurophilicinteraction for L=PMe3, PPh3, and PCy3. The study of their dynamic behaviour
Mechanism of Reductive Elimination of Methyl Iodide from a Novel Gold(III)−Monomethyl Complex
作者:Valerie J. Scott、Jay A. Labinger、John E. Bercaw
DOI:10.1021/om1006566
日期:2010.9.27
3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) with I2 gives a monomethyl Au(III) complex, (Idipp)AuI2Me, which decomposes cleanly to MeI and (Idipp)AuI. Kinetics experiments show that this transformation occurs primarily via three-coordinate, cationic [(Idipp)AuIMe]+, which undergoes intramolecular reductiveelimination rather than nucleophilic attack by external I−.