Z -selective dimerization of terminal alkynes by a (PNNP)Fe II complex

A tetradentate bis(amido)bis(phosphine) Fe complex, (PNNP)Fe, is shown to activate the terminal C-H bond of aryl alkynes across its Fe-N bonds. (PNNP)Fe is also shown to catalytically dimerize terminal aryl alkynes to produce 1,3-enynes with  :  ratios as high as 96 : 4 with yields up to 95% and loa...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2024-05, Vol.60 (39), p.5169-5172
Main Authors: Stevens, Jeremiah E, Miller, Justin D, Fitzsimmons, Matthew C, Moore, Curtis E, Thomas, Christine M
Format: Article
Language:English
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Summary:A tetradentate bis(amido)bis(phosphine) Fe complex, (PNNP)Fe, is shown to activate the terminal C-H bond of aryl alkynes across its Fe-N bonds. (PNNP)Fe is also shown to catalytically dimerize terminal aryl alkynes to produce 1,3-enynes with  :  ratios as high as 96 : 4 with yields up to 95% and loadings as low as 1 mol% at 30 °C in 2 h. A plausible metal-ligand cooperative mechanism invoking a vinylidene intermediate is proposed.
ISSN:1359-7345
1364-548X
DOI:10.1039/D4CC00469H