[(N,N′-dibenzyl-2-amino-3-chloro-4-imino-2-pentene-H)Cu(μ-O)iPr]2 | 1491152-39-6

• 英文名称: [(N,N′-dibenzyl-2-amino-3-chloro-4-imino-2-pentene-H)Cu(μ-O)iPr]2
• 英文别名: [ClnacnacBnCu(μ-O)iPr]2
• CAS: 1491152-39-6
• 化学式: C₄₄H₅₄Cl₂Cu₂N₄O₂
• 分子量: 868.936
• InChiKey: NOWBEZYDTVMUOH-RVQRMQGSSA-N

反应信息

• 作为产物：
  描述：

  N,N′-dibenzyl-2-amino-4-imino-2-pentene 在 N-氯代丁二酰亚胺 作用下， 以 四氢呋喃 、 甲苯 为溶剂， 反应 18.75h， 生成 [(N,N′-dibenzyl-2-amino-3-chloro-4-imino-2-pentene-H)Cu(μ-O)iPr]2
  参考文献：
  名称：

  Square-Planar Cu(II) Diketiminate Complexes in Lactide Polymerization

  摘要：

  Cu(OiPr)(2) was reacted with several beta-diketimine ligands, nacnac(R)H. Sterically undemanding ligands with N-benzyl substituents afforded the dimeric heteroleptic complexes [nacnac(Bn)Cu(mu-OiPr)](2) and [3-Cl-nacnac(Bn)Cu(mu-OiPr)](2) (Bn = benzyl). With sterically more demanding amines, dimerization was not possible, and the putative nacnacCuOiPr intermediate underwent ligand exchange to the homoleptic bisdiketiminate complexes Cu(nacnac(ipp))(2) and Cu(nacnac(Naph))(2) (ipp = 2-isopropylphenyl, Naph = 1-napthyl). Homoleptic complexes were also prepared with N-benzyl ligands to yield Cu(nacnac(Bn))(2) and Cu(3-succinimido-nacnac(Bn))(2). All complexes were characterized by single-crystal X-ray diffraction. Even bulkier ligands with N-anthrylmethyl, N-mesitylmethyl, or N-methylbenzyl substituents failed to react with Cu(OiPr)(2). In the case of nacnac(dipp)CuOiPr, putative nacnac(dipp)CuOiPr decomposed by beta-hydride elimination. Heteroleptic complexes [nacnac(Bn)Cu(mu-OiPr)](2) and [3-Cl-nacnac(Bn)Cu(mu-OiPr)](2) are very highly active rac-lactide polymerization catalysts, with complete monomer conversion at ambient temperature in solution in 0.5-5 min. In the presence of free alcohol, the homoleptic complexes seem to be in equilibrium with small amounts of the respective heteroleptic complex, which are sufficient to complete polymerization in less than 60 min at room temperature. All catalysts show high control of the polymerization with polydispersities of 1.1 and below. The obtained polymers were essentially atactic, with a slight heterotactic bias at ambient temperature and at -17 degrees C.

  DOI：

  10.1021/ic402133c