Abstract
Synthesis of the electron-rich 2-substituted-6-(phenylsulfonyl)pyridines is presented. A series of air-stable, tunable, P-chiral pyridyl-dihydrobenzooxaphosphole ligands were designed and synthesized by a diastereoselective S(N)Ar substitution of the corresponding sulfonyl pyridines. The ligands were successfully applied in the Ir-catalyzed asymmetric hydrogenation of unfunctionalized alkenes with good enantioselectivities.
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