Palladium-Catalyzed Cross-Coupling Reactions of 2-Pyridylborates with Air-Stable HASPO Preligands
作者:Lutz Ackermann、Harish Potukuchi
DOI:10.1055/s-0029-1218020
日期:2009.10
A novel, air-stable TADDOLP(O)H derivative bearing electron-withdrawing substituents allows for efficient Suzuki-Miyaura cross-couplings with challenging electron-deficient 2-pyr-idylborates as nucleophiles.
TBAF-Catalysed silver oxide-mediated cross-coupling of functional trimethysilylpyridines: access to arylpyridines and bihetaryl compounds
作者:Frédéric Louërat、Heather Tye、Spencer Napier、Michael Garrigou、Mark Whittaker、Philippe C. Gros
DOI:10.1039/c0ob00710b
日期:——
The concomitant use of silver oxide and catalytic amount of TBAF allowed the efficient and chemoselective coupling of readily available 4-chloro- and 4-methyl-2-trimethyl-silyl-pyridines with heteroaromatic and aromatic halides. Based on control experiments, a mechanism involving the formation of a pyridylsilver intermediate and TBAF recycling is postulated.