Pronounced effects of substituents on the iridium-catalyzed borylation of aryl C–H bonds‡
Literature Information
Carl W. Liskey, Carolyn S. Wei, Dale R. Pahls, John F. Hartwig
Iridium trisboryl complexes containing bisphosphine and bipyridine ligands and pinacolate and catecholate substituents on boron are reported. A large difference in reactivity towards the borylation of C–H bonds is observed for this series of trisboryl complexes, and this difference is attributed to the electron-donating properties of the pinacolate vs.catecholate groups, and the steric and electronic properties of bipyridinevs.bisphosphine ligands.
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![Ethyl 4-[8-chloro(5,5,6,6,7-~2~H_5_)-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene]-1-piperidinecarboxylate structure Ethyl 4-[8-chloro(5,5,6,6,7-~2~H_5_)-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene]-1-piperidinecarboxylate structure](https://static.chemtradehub.com/structs/102/1020719-57-6-37e2.webp)

![5,10-Dihydroindeno[2,1-a]indene structure 5,10-Dihydroindeno[2,1-a]indene structure](https://static.chemtradehub.com/structs/654/6543-29-9-71ca.webp)
