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• W2012493412 abstract "Twelve optically active metallocene complexes of Ca, Sm(II), and Yb(II) containing cyclopentadienyl systems with a chiral N- or O-substituted side chain as ligands are described. Specifically, the ligand systems (S)-(2-methoxypropyl)cyclopentadienyl ((S)-C5H4CH2CH(Me)OMe)) and (S)-(2-methoxy-2-phenylethyl)cyclopentadienyl ((S)-C5H4CH2CH(Ph)OMe)) and the novel (S)-[2-(dimethylamino)propyl]cyclopentadienyl ((S)-C5H4CH2CH(Me)NMe2)) and (S)-[2-(dimethylamino)-1-phenylethyl]cyclopentadienyl ((S)-C5H4CH(Ph)CH2NMe2)) systems were employed. The starting materials for their synthesis are ethyl (S)-(−)-lactate, (R)-(−)-2-methoxy-2-phenylethanol, (S)-(+)-2-amino-1-propanol, and (R)-(−)-2-phenylglycinol, respectively. Each of the cyclopentadienyl systems was converted by a 2:1 reaction of the potassium salt with the metal diiodide into the corresponding metallocene, [M{(S)-η5:η1-C5H4(CH2CH(R)OMe)}2] (R = Me, M = Ca (1a), Sm (1b), Yb (1c); R = Ph, M = Ca (3a), Sm (3b), Yb (3c)), [M{(S)-η5:η1-C5H4(CH2CH(Me)NMe2)}2] (M = Ca (2a), Sm (2b), Yb (2c)), and [M{(S)-η5:η1-C5H4(CH(Ph)CH2NMe2)}2] (M = Ca (4a), Sm (4b), Yb (4c)). The novel compounds have been characterized by C, H, N analysis, mass spectrometry, NMR spectroscopy, and optical rotation. Additionally, an X-ray structural analysis of 2c, 3a, and 4a was performed." @default.
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• W2012493412 title "Organometallic Compounds of the Lanthanides. 110.¹ Donor-Functionalized Chiral Cyclopentadienyl Complexes of Calcium, Samarium(II), and Ytterbium(II). A New Class of Chiral Metallocenes" @default.
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• W2012493412 doi "https://doi.org/10.1021/om9603474" @default.
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