2-(Di-tert-butylphosphino)biphenyl

1. Ligand used in the palladium-catalyzed synthesis of aromatic amines from aryl chlorides, bromides and triflates.
2. Ligand employed in a very active and general catalyst for Suzuki coupling reactions using aryl chlorides, bromides and triflates.
3. Ligand used in palladium-catalyzed synthesis of oxindoles from α-chloroacetanilides.
4. Effective ligand used in palladium-catalyzed arylation of thiazoles.
5. Used in the formation of 2-benzylindolines via sequential palladium-catalyzed N-arylation/cyclization/C-arylation.
6. Selective in the palladium-catalyzed arylation of silyl enol ethers formed from copper-catalyzed reduction of enones.

white to light yellow crystal powde

suzuki reaction

2-(Di-tert-butylphosphino)biphenyl (also known as JohnPhos) is a Buchwald ligand that is highly efficient in palladium-catalyzed reactions.

JohnPhos is a Buchwald′s sterically bulky biaryl phosphine ligand. It is a reactive dialkylbiaryl phosphine ligand which catalyzes the carbon-nitrogen bond-forming reactions. Coordination chemistry of gold catalysts bearing JohnPhos as ligand has been investigated by NMR spectroscopy.