Devaine-Pressing Katalin, Lehr Joshua H, Pratt Michelle E, Dawe Louise N, Sarjeant Amy A, Kozak Christopher M
Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3X7.
Dalton Trans. 2015 Jul 21;44(27):12365-75. doi: 10.1039/c5dt00236b.
Magnesium compounds of tetradentate amino-bis(phenolato) ligands, Mg[L1] (1) and Mg[L2] (2) (where [L1] = 2-pyridyl-N,N-bis(2-methylene-4-methoxy-6-tert-butylphenolato), and [L2] = dimethylaminoethylamino-N,N-bis(2-methylene-4-methyl-6-tert-butylphenolato)) were prepared. The proligands, H2[L1] and H2[L2] were reacted with di(n-butyl)magnesium in toluene to give the desired compounds in high yields. Compounds 1 and 2 exhibit dimeric structures in solutions of non-coordinating solvents as observed by NMR spectroscopy and in the solid state as shown by the single crystal X-ray structure of 2. These compounds exhibit good activity for rac-lactide polymerization in solution and in molten lactide.
制备了四齿氨基双（酚盐）配体的镁化合物Mg[L1]（1）和Mg[L2]（2）（其中[L1] = 2-吡啶基-N，N-双（2-亚甲基-4-甲氧基-6-叔丁基酚盐），[L2] =二甲基氨基乙基氨基-N，N-双（2-亚甲基-4-甲基-6-叔丁基酚盐））。前体配体H2[L1]和H2[L2]与二（正丁基）镁在甲苯中反应，以高产率得到所需化合物。通过核磁共振光谱观察，化合物1和2在非配位溶剂溶液中呈现二聚体结构，如2的单晶X射线结构所示，在固态中也是如此。这些化合物在溶液中和熔融丙交酯中对rac-丙交酯聚合表现出良好的活性。
