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- W2112137363 abstract "The palladium catalysed Miyaura cross-coupling reactions of 4′-(4-bromophenyl)-2,2′:6′,2″-terpyridine (tpy-ϕ-Br) and 4′-bromo-2,2′:6′,2″-terpyridine (tpy-Br) with bis(neopentyl glycolato)diboron (B2neo2) lead to the first reported examples of boronate ester-substituted terpyridine ligands, L1 and L2. Ligand L1, which incorporates a benzene ring between the terpyridine group and the boron, reacts with transition metals such as iron and ruthenium to generate complexes containing the analogous boronic acid-substituted terpyridine L3. The heteroleptic complex [Ru(ttpy)L3]2+ has also been prepared by an analogous cross-coupling reaction of the bromo complex [Ru(ttpy)(tpy-ϕ-Br)]2+ with B2neo2 (ttpy = 4′-tolyl-2,2′:6′,2″-terpyridine). The structurally related complex [Ru(ttpy)L4]2+ (L4 = terpyridine-4′-boronic acid) could not be prepared, either directly from L2 or from [Ru(ttpy)(tpy-Br)]2+, apparently due to competitive hydrodeboration and solvolysis. The complex [Ru(ttpy)L3]2+ reacts with aryl halides under standard palladium-catalysed Suzuki–Miyaura cross-coupling conditions to generate more elaborate 4′-aryl-substituted terpyridyl complexes. Cross-coupling has also been achieved by reaction of [Ru(ttpy)(tpy-Br)]2+ with an arylboronic acid. The photophysical properties of [Ru(ttpy)L3]2+ are shown to be largely typical of ruthenium bis-terpyridyl complexes." @default.
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- W2112137363 date "2001-01-01" @default.
- W2112137363 modified "2023-10-16" @default.
- W2112137363 title "Palladium-catalysed cross-coupling reactions of ruthenium bis-terpyridyl complexes: strategies for the incorporation and exploitation of boronic acid functionality" @default.
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- W2112137363 doi "https://doi.org/10.1039/b103062k" @default.
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