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- W2124016822 abstract "A practical, functional group tolerant method for the Rh-catalyzed direct arylation of a variety of pharmaceutically important azoles with aryl bromides is described. Many of the successful azole and aryl bromide coupling partners are not compatible with methods for the direct arylation of heterocycles using Pd(0) or Cu(I) catalysts. The readily prepared, low molecular weight ligand, Z-1-tert-butyl-2,3,6,7-tetrahydrophosphepine, which coordinates to Rh in a bidentate P-olefin fashion to provide a highly active yet thermally stable arylation catalyst, is essential to the success of this method. By using the tetrafluoroborate salt of the corresponding phosphonium, the reactions can be assembled outside of a glovebox without purification of reagents or solvent. The reactions are also conducted in THF or dioxane, which greatly simplifies product isolation relative to most other methods for direct arylation of azoles employing high-boiling amide solvents. The reactions are performed with heating in a microwave reactor to obtain excellent product yields in 2 h." @default.
- W2124016822 created "2016-06-24" @default.
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- W2124016822 date "2008-02-01" @default.
- W2124016822 modified "2023-10-16" @default.
- W2124016822 title "Rh(I)-Catalyzed Arylation of Heterocycles via C−H Bond Activation: Expanded Scope through Mechanistic Insight" @default.
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- W2124016822 doi "https://doi.org/10.1021/ja0748985" @default.
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