Aluminum complexes of bidentate phenoxy-amine ligands: Synthesis, characterization and catalysis in ring-opening polymerization of cyclic esters
作者:Yuan Wang、Haiyan Ma
DOI:10.1016/j.jorganchem.2013.02.012
日期:2013.5
afforded monoligated complexes LBu,EtAlMe2 (1a), LCumyl,EtAlMe2 (2a) and LCumyl,BuAlMe2 (3a), whereas the treatment of 2-(N-benzyl-N-R3-aminomethyl)-4,6-dichlorophenols (R3 = ethyl, 4; R3 = tBu, 5) with 0.5 equivalent of AlMe3 resulted in the formation of (LCl,Et)2AlMe (4a) or (LCl,Bu)2AlMe(HLCl,Bu) (5a) respectively. All of these aluminum methyl complexes can efficiently polymerize rac-lactide to atactic
合成了一系列带有二齿苯氧基-胺配体的铝配合物1a - 5a,并通过NMR光谱和元素分析对其进行了表征。苯氧基部分的邻位取代基和辅助配体的氨基的变化对所得铝配合物的化学计量结构具有至关重要的影响。的2-(反应Ñ苄基Ñ -R 3 -氨甲基)-4-R 2 -6-R 1 -phenols(R 1 = 吨卜,R 2 =我,R 3 =乙基,1 ; R 1 = R 2 =枯基,R 3 =乙基,2 ; R 1 = R 2 =枯基,R 3 = t Bu,3)或一或一半当量的AlMe 3独家提供的单连接配合物L Bu,Et AlMe 2(1a),L Cumyl,Et AlMe 2(2a)和L Cumyl Bu AlMe 2(3a),而处理2-(N-苄基-N -R 3-氨基甲基)-4,6-二氯苯酚(R 3 =乙基,4 ; R 3 = t Bu,5)与0.5当量的AlMe 3分别形成(L Cl,Et)2