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- W2333934363 abstract "The first “in air” copper-catalyzed method for the selective synthesis of tri- and tetrasubstituted vinylboronate derivatives is presented. Three different variants of the borylation of internal alkynes (α-hydroboration, β-hydroboration, and carboboration) are described using a single catalyst: [Cu(Cl)(IMes)] (IMes = N,N′-bis-[2,4,6-(trimethyl)phenyl]imidazol-2-ylidene) without taking any precaution to avoid the presence of air. Bis(pinacolato)diboron was used to afford β-hydroborated products in the presence of methanol. Adding instead another electrophile allowed the formation of tetrasubstituted vinylboronate species. Finally, the α-products were obtained using pinacolborane as the boron source. All compounds were obtained in high yield with excellent regioselectivity at low catalyst loading (0.04–2 mol %). The protocol constitutes a very convenient route to access these highly valuable molecules." @default.
- W2333934363 created "2016-06-24" @default.
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- W2333934363 date "2014-04-18" @default.
- W2333934363 modified "2023-10-02" @default.
- W2333934363 title "Copper-Catalyzed Regioselective Formation of Tri- and Tetrasubstituted Vinylboronates in Air" @default.
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- W2333934363 doi "https://doi.org/10.1021/cs500130y" @default.
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