125670-60-2Relevant academic research and scientific papers
Alternating ring-opening copolymerization of styrene oxide and maleic anhydride using asymmetrical bis-Schiff-base metal(iii) catalysts
Liu, Dengfeng,Zhang, Xingmei,Zhu, Luqun,Wu, Jing,Lü, Xingqiang
, p. 562 - 571 (2015)
A ring-opening copolymerization of styrene oxide with maleic anhydride was performed by applying a series of asymmetrical bis-Schiff-base metal(iii) catalysts. The chromium catalyst exhibited the best performance and therefore the catalyst (salen)CrCl (sa
Synthesis and structural characterization of aluminum complexes supported by NNO-tridentate ketiminate ligands: Efficient catalysts for ring-opening polymerization of l-lactide
Chuang, Hui-Ju,Su, Yu-Chu,Ko, Bao-Tsan,Lin, Chu-Chieh
scheme or table, p. 38 - 42 (2012/04/23)
Four NNO-tridentate ketiminate derivatives (HL-H, FL-H, OMeL-H and tBuL-H) were prepared through the condensation reaction of 1-(4-chlorophenyl)-4-(4-X-benzoyl)-3-methyl-1H- pyrazol-5(4H)-one (X = H, F, OMe, tBu) with N,N-dimethylenediamine (1.1 molar equiv) under reflux condition. Further reaction of AlMe3 (1.2 molar equiv) with HL-H, FL-H, OMeL-H and tBuL-H, respectively, affords penta-coordinated mono-adduct aluminum complexes [(HL)AlMe2] (1), [(FL)AlMe 2] (2), [(OMeL)AlMe2] (3), and [( tBuL)AlMe2] (4) in high yield. Experimental results indicate complexes 1-4 are active catalysts for ring-opening polymerization of l-lactide (l-LA) in the presence of benzyl alcohol (BnOH). Al complex 2 catalyzes efficiently not only in a "living" fashion but also an "immortal" manner, giving polymers with the expected molecular weights and narrow PDIs.
