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- W2294239476 abstract "In the early stages of this DOE-funded research project, we sought to prepare and study a well-defined nickel-alkyl complex containing tridentate nitrogen donor ligands. We found that reaction of (TMEDA)NiMe2 (1) with terpyridine ligand cleanly led to the formation of (terpyridyl)NiMe (2), which we also determined to be an active alkylation catalyst. The thermal stability of 2 was unlike that seen for any of the active pybox ligands, and enabled a number of key studies on alkyl transfer reactions to be performed, providing new insights into the mechanism of nickel-mediated alkyl-alkyl cross-coupling reactions. In addition to the mechanistic studies, we showed that the terpyridyl nickel compounds can catalytically cross-couple alkyl iodides in yields up to 98% and bromides in yields up to 46 %. The yields for the bromides can be increased up to 67 % when the new palladium catalyst [(tpy’)Pd-Ph]I is used. The best route to the targeted [(tpy)NiBr] (1) was found to involve the comproportionation reaction of [(dme)NiBr{sub 2}] and [Ni(COD){sub 2}] in the presence of two equivalents of terpyridine. This reaction was driven to high yields of product formation (72 % isolated) by the precipitation of 1 from THF solvent." @default.
- W2294239476 created "2016-06-24" @default.
- W2294239476 creator A5084146813 @default.
- W2294239476 date "2014-05-01" @default.
- W2294239476 modified "2023-09-23" @default.
- W2294239476 title "Final Technical Report [Development of Catalytic Alkylation and Fluoroalkylation Methods]" @default.
- W2294239476 doi "https://doi.org/10.2172/1130313" @default.
- W2294239476 hasPublicationYear "2014" @default.
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