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CAAC–IPr*: easily accessible, highly sterically-hindered cyclic (alkyl)(amino)carbenes
Autorzy
Rok wydania
2022
Czasopismo
Numer woluminu
58
Strony
13467-13470
DOI
10.1039/d2cc05668b
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
IPr* (IPr* = 1,3-bis(2,6-bis(diphenylmethyl)-4-methylphenyl)imidazol-2-ylidene) has emerged as a powerful highly hindered and sterically-flexible ligand platform for transition-metal catalysis. CAACs (CAAC = cyclic (al-kyl)(amino)carbenes) have gained major attention as strongly electron-rich carbon analogues of NHCs (NHC = N-heterocyclic carbene) with broad applications in both industry and academia. Herein, we report a merger of CAAC ligands with highly-hindered IPr*. The efficient synthesis, electronic characterization and application in model Cu-catalyzed hydroboration of alkynes is described. The ligands are strongly electron-rich, bulky and flexible around the N-Ar wingtip. The availability of various IPr* and CAAC templates offers a significant potential to expand the existing arsenal of NHC ligands to electron-rich bulky architectures with critical applications in metal stabilization and catalysis.
Adres publiczny
http://dx.doi.org/10.1039/d2cc05668b
Strona internetowa wydawcy
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