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- W2156883200 abstract "Abstract Several new ligands featuring a rigid three ring skeleton have been prepared for the first time following a modular approach. Chirality has been introduced by use of an oxazoline moiety fused with a cyclopenta[ b ]thiophene backbone. The efficiency and stereochemical impact of these ligands on the copper‐catalyzed enantioselective addition of Et 2 Zn to chalcone was examined and enantiomeric excesses up to 79% were achieved using the ligand ( R , R )‐ 16 substituted with a methyl group at the cyclopenta moiety. Computational and ESI‐mass spectral studies show that these new compounds behave as monodentate ligands towards Cu + . (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)" @default.
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- W2156883200 date "2004-10-13" @default.
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- W2156883200 title "Diastereoselective Synthesis of Thieno[3′,2′:4,5]cyclopenta[1,2‐<i>d</i>][1,3]oxazolines − New Ligands for the Copper‐Catalyzed Asymmetric Conjugate Addition of Diethylzinc to Enones" @default.
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- W2156883200 doi "https://doi.org/10.1002/ejoc.200400351" @default.
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