Quality Control of (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine. 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 Iridium-catalyzed asymmetric hydrogenation of pyridinium salts. Author is Ye, Zhi-Shi; Chen, Mu-Wang; Chen, Qing-An; Shi, Lei; Duan, Ying; Zhou, Yong-Gui.
A highly efficient iridium-catalyzed asym. hydrogenation of 2-substituted pyridinium salts is developed. A series of chiral 2-substituted piperidines were obtained in good to excellent yields and up to 93% ee.
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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider