694440-53-4

Upstream product

• 24544-04-5 2,6-diisopropylbenzenamine 
• 90-04-0 2-methoxy-phenylamine 
• 205993-26-6 4-((2,6-di(isopropyl)phenyl)amino)-pent-3-en-2-one 
• 123-54-6 acetylacetone 

Downstream Products

• 694440-65-8 (2-(2-methoxyphenylimino)-4-(2,6-diisopropylphenylamido)pent-2-eneato)ZnEt 
• 694440-64-7 (2-(2-methoxyphenylimino)-4-(2,6-diisopropylphenylamido)pent-2-eneato)ZnNTMS₂ 
• 694440-67-0 (2-(2-methoxyphenylimino)-4-(2,6-diisopropylphenylamido)pent-2-eneato)ZnOSiPh₃ 

Relevant academic research and scientific papers

Comparative study of lactide polymerization by zinc alkoxide complexes with a β-diketiminato ligand bearing different substituents

A series of β-diketiminate zinc complexes has been synthesized and their reactivity for the ring-opening polymerization (ROP) of lactide has been studied. The reaction of β-diketimines (LH) with diethyl zinc forms the monomeric [LZnEt] complexes which further react with benzyl alcohol (BnOH) in toluene/hexane yielding dinuclear or trinuclear zinc complexes. These complexes have been characterized by single crystal X-ray diffraction, which showed the tri- and tetra-coordinated zinc complexes in which zinc atoms exhibit trigonal and tetrahedral geometry, respectively. All complexes have been tested as initiators for the ring-opening polymerization of lactide; they are all highly active. The rate of polymerization is heavily dependent on the N-aryl substituents with the order: alkyl group ～ alkoxy > halide group > nitro group. The β-diketiminate zinc complexes allow controlled ring-opening polymerization as shown by the linear relationship between the percentage conversion and the number-average molecular weight. On the basis of literature reports, a mechanism for ROP of lactide has been proposed.