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Iridium Catalysis for C-H Bond Arylation of Heteroarenes with Iodoarenes

Benoit Join, Takuya Yamamoto, and Kenichiro Itami
Angew. Chem. Int. Ed. 2009, 48, 3644.

DOI: 10.1002/anie.200806358

Efficient couplings

using equimolar quantities of each coupling partner and multiple C-H bond arylation reactions are achieved with an Ir-based catalytic system for the C-H bond arylation of electron-rich heteroarenes with iodoarenes to construct extended pai-systems. The dramatic ligand effect on reaction efficiency leads to the discovery that Crabtree’s catalyst (see scheme) is the optimal catalyst precursor.

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