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- W3146670251 abstract "A series of lithium and aluminum complexes bearing [OC(But)CHP(Ph2)=NBut]-ligand were synthesized and characterized. Reaction of ButC(O)CH2Br with Ph2PNHBut afforded [Ph2P(NHBut)CH2C(O)But]+Br–(1). Treatment of 1 with excess of NaH in THF generated ligand precursor Ph2P(CH2C(O)But)=NBut (2). Reaction of 2 with AlR3 (R = Me,Et) gave N,O-chelate aluminum complexes [R2Al{OC(But)CHP(Ph2)=NBut}] (3,R = Me; 4,R = Et). Lithiation of 2 with an equiv. of LiBun formed lithium complex [Li{OC(But)CHP(Ph2)=NBut}] (5). Reaction of the lithium complex with an equiv. of AlCl3 yielded [Cl2Al{OC(But) CHP(Ph2)=NBut}] (6). Complex 6 was also obtained by reaction of 3 with an equiv. of AlCl3. Compounds 2–6 were characterized by NMR spectroscopy,elemental analysis and single crystal X-ray diffraction techniques (for 2,3 and 6). Catalysis of complexes 3 and 4 as well as [Me2Al{1-{OC(Ph)CH}-3-R1-5-MeC3HN2}] (R1 = Me,But) toward the ring-opening polymerization of e-caprolactone was investigated." @default.
- W3146670251 created "2021-04-13" @default.
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- W3146670251 date "2010-01-01" @default.
- W3146670251 modified "2023-09-28" @default.
- W3146670251 title "Synthesis of lithium and aluminum complexes supported by [OC(Bu~t)CHP(Ph_2)=NBu~t]~-ligand and catalysis of [R_2Al{OC(Bu~t)-CHP(Ph_2)=NBu~t}] (R=Me,Et) and [Me_2Al{1-{OC(Ph)CH}-3-R~1-5-MeC_3HN_2}] (R~1=Me,Bu~t) in the ring-opening polymerization of ε-capr" @default.
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