[(S,S)-Phebox-ⁱPr]₃La | 1426300-05-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: [(S,S)-Phebox-ⁱPr]₃La
• 英文别名: (S,S)-[2,6-bis(4′-isopropyl-2′-oxazolinyl)phenyl]₃La
• CAS: 1426300-05-1
• 化学式: C₅₄H₆₉LaN₆O₆
• 分子量: 1037.08
• InChiKey: XZJOATYMVRSAQR-OQTCTQNOSA-N

反应信息

• 作为产物：
  描述：

  LuCl₃(THF)₂ 、 (S,S)-2,6-bis(4′-isopropyl-2'-oxazolinyl)phenyl bromide 在 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 24.33h， 以32.8%的产率得到[(S,S)-Phebox-ⁱPr]₃La
  参考文献：
  名称：

  Bis(oxazolinyl)phenyl-Ligated Rare-Earth-Metal Complexes: Highly Regioselective Catalysts for cis-1,4-Polymerization of Isoprene

  摘要：

  NCN-pincer (S,S)-2,6-bis(4'-isopropyl-2'-oxazolinyl)phenyl-ligated rare-earth-metal dichlorides [(S,S)-Phebox-Pr-i]LnCl(2)(THF)(2) (Ln = Sc (1); Y (2); Dy (3); Ho (4); Tm (5); Lu (6)) were synthesized via transmetalation between [(S,S)-Phebox-Pr-i]Li and LnCl(3) in THF solvent. Interestingly, treatment of LaCl3 by the same method generated tris(ligand) lanthanum complex [(S,S)-Phebox-Pr-i](3)La (7). Molecular structures of complexes 1, 2, 3, and 7 were established by single-crystal X-ray diffraction study. Pincer ligand (S,S)-Phebox-Pr-i adopts a kappa C:kappa N:kappa N' tridentate coordination mode to the central metal ion. Upon activation with [PhNHMe2][B(C6F5)(4)] and (AlBu3)-Bu-i, complexes 2-5 exhibited highly catalytic activities and more than 98% cis-1,4-selectivity for isoprene polymerization while complexes 1 and 6 were inactive for this reaction. When use of the catalyst system consisted of complex 2, [PhNHMe2][B(C6F5)(4)], and (AlBu3)-Bu-i for isoprene polymerization, the resultant polymer has a high cis-1,4-selectivity up to 99.5%. The reaction temperature had little effect on the regioselectivity, and high cis-1,4-selectivity almost remained even at 80 degrees C.

  DOI：

  10.1021/ic300976p