Cortright, Sarah B. Huffman, John C. Yoder, Ryan A. Coalter, Joseph N. Johnston, Jeffrey N. IAN Amines:  Chiral <i>C</i><sub>2</sub>-Symmetric Zirconium(IV) Complexes from Readily Modified Axially Chiral <i>C</i><sub>1</sub>-Symmetric β-Diketimines A general synthesis of β-diketimines derived from <i>I</i>soquinoline and <i>A</i>mino<i>N</i>aphthalene components (IAN amines) is reported. Beginning from inexpensive 2-naphthol and isoquinoline, the sequence of reactions leading to R-IAN amines is convergent, short, and high-yielding. Several new derivatives are reported (e.g., R = Bn, <i><sup>i</sup></i><sup></sup>Pr, <i><sup>t</sup></i><sup></sup>Bu, Ph, 2,6-Me<sub>2</sub>Ph, 2,6-<i><sup>i</sup></i><sup></sup>Pr<sub>2</sub>Ph, 2-Np). All of these were complexed to zirconium(IV) by transamination with Zr(NMe<sub>2</sub>)<sub>4</sub>, and in all cases 1:1 R-IAN:Zr complexes immediately formed at 25 °C. Except in cases of severe steric hindrance (<i><sup>i</sup></i><sup></sup>Pr-IAN and 2,6-Me<sub>2</sub>Ph), the corresponding 2:1 IAN:Zr complexes formed at temperatures ranging from 25 to 100 °C in toluene. A feature conserved among all 2:1 IAN:Zr complexes was a remarkable degree of diastereoselectivity favoring a <i>C</i><sub>2</sub>-symmetric bis(β-diketiminate) isomer bearing <i>cis</i>-NMe<sub>2</sub> and <i>cis</i>-pyridyl ligands. Although all complexations were performed from <i>rac</i>-IAN, the resulting complexes are composed solely of homochiral ligands. The configurational integrity of Me-IAN and its ability to transfer asymmetry upon metal coordination was demonstrated in the catalyzed enantioselective addition of diethylzinc to benzaldehyde. Given the topographical similarity between these and metallocene complexes, several derivatives were preliminarily evaluated in ethylene polymerization. metallocene complexes;configurational integrity;derivative;t Bu;pyridyl ligands;Symmetric;ethylene polymerization;enantioselective addition;metal coordination;transfer asymmetry;Modified Axially Chiral C 1;homochiral ligands;ci;mino N aphthalene components;i Pr;NMe 2;topographical similarity;C 2;steric hindrance;IAN amines;2 Ph 2004-05-10
    https://acs.figshare.com/articles/dataset/IAN_Amines_Chiral_i_C_i_sub_2_sub_Symmetric_Zirconium_IV_Complexes_from_Readily_Modified_Axially_Chiral_i_C_i_sub_1_sub_Symmetric_Diketimines/3340231
10.1021/om049897p.s001