Comparative Study of Lactide Polymerization with Lithium, Sodium, Potassium, Magnesium, Calcium, and Zinc Azo­naphthoxide Complexes

Lithium Half‐Salen Complexes: Synthesis, Structural Characterization and Studies as Catalysts for rac‐Lactide Ring‐Opening Polymerization

“…Lithium complexes have shown great potential as LA ROP catalysts as lithium is highly Lewis acidic, inexpensive and non‐toxic; the latter is an important benefit in preparing PLA for biomedical applications [25–27] . Simple lithium complexes such as butyllithium [28] and lithium tert‐butoxide [28,29] are highly active for LA ROP but are generally accompanied by limited controllability and undesirable transesterification reactions.…”

“…Lithium complexes have shown great potential as LA ROP catalysts as lithium is highly Lewis acidic, inexpensive and nontoxic; the latter is an important benefit in preparing PLA for biomedical applications. [25][26][27] Simple lithium complexes such as butyllithium [28] and lithium tert-butoxide [28,29] are highly active for LA ROP but are generally accompanied by limited controllability and undesirable transesterification reactions. Tailored ligand design offers a route to improve the catalyst performance, and lithium complexes bearing bulky ligands such as aminephenolates [30] or azonaphtholates [26] have been reported as effective catalysts under mild conditions.…”

Copolymerization of L-Lactide and ε-Caprolactone promoted by zinc complexes with phosphorus based ligands

“…For example, for this application a good flexibility of the material is required to transfer, effectively and synchronically, the myocardium contraction and the mechanical stimulus from the myocardial microenvironment to the incorporated cells (Park et al, 2005;Jin et al, 2009). The most efficient synthetic method for producing homo-and copolymers of CL and LA is the ring-opening polymerization (ROP) (Sutar et al, 2015;Fuoco and Pappalardo 2017; (Gallegos et al, 2015;Strianese et al, 2020) of the corresponding cyclic esters and of their mixture (Li et al, 2014;Wang et al, 2014) by using coordination complexes of several metals as initiators.…”

A One‐Pot Synthesis of “K(hfa) glyme” Adducts: Effect of the Polyether Length on the Ion Coordination Sphere

“…[7][8][9] The presence of two oxygen atoms in the diketone offers a variety of metal-organic architectures behaving as bidentate ligands. Likewise, monoanionic bidentate N,N', of the type β-diketiminates [10] and aminotroponiminates, [11] and N,O, such as azonaphthoxide [12] are conventionally used ligands in the coordination chemistry of main group and transition metals.…”