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  • Title: Rhodium-catalyzed enantioselective hydrogenation of unsaturated phosphonates by ClickFerrophos ligands.
    Author: Konno T, Shimizu K, Ogata K, Fukuzawa S.
    Journal: J Org Chem; 2012 Apr 06; 77(7):3318-24. PubMed ID: 22420784.
    Abstract:
    Newly developed ClickFerrophos II ligands were applied in the hydrogenation of α,β-unsaturated phosphonates. The use of a rhodium/ClickFerrophos II catalyst was examined in the hydrogenation of functionalized α,β-unsaturated phosphonates and was revealed to be effective for β-alkyl-β-aryl or β-dialkyl phosphonates, (Z)-β-enolester phosphonates, and α-phenylethenyl phosphonates, producing the corresponding chiral phosphonates in good yields with high enantioselectivities (up to 96% ee).
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