Recommanded Product: 221012-82-4. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine, is researched, Molecular C38H34N2O4P2, CAS is 221012-82-4, about Highly effective chiral dipyridylphosphine ligands: Synthesis, structural determination, and applications in the Ru-catalyzed asymmetric hydrogenation reactions. Author is Barbara, Pierluigi; Bianchini, Claudio.
The synthesis of the new heteroaromatic chiral diphosphine ligands (R) and (S)-(P-phos) [P- phos = 2,2′,6,6′-tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine] was carried out by a standard synthetic protocol ending up with an Ullmann coupling, followed by resolution of the racemic product. The ligands display an axial chirality due to atropisomery-, analogous to that observed in the parent ligand MeO-BIPHEP. Well-defined ruthenium(II) catalysts were prepared and employed to catalyze the hydrogenation of a prochiral olefins of pharmaceutical relevance and various β-ketoesters.
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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider