Preparation and characterization of bisphenolato magnesium derivatives: an efficient catalyst for the ring-opening polymerization of ε-caprolactone and L-lactide
| Autor: | Wen-Chou Hung, Min-Yi Shen, Ya-Liu Peng, Chu-Chieh Lin |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Molecular Structure
Polymers Magnesium chemistry.chemical_element Ether Crystallography X-Ray Ligands Ring-opening polymerization Medicinal chemistry Catalysis Dioxanes Inorganic Chemistry Lactones chemistry.chemical_compound Dimethyl sulfate chemistry Polymerization Benzyl alcohol Organic chemistry Caproates Caprolactone |
| Zdroj: | Dalton Transactions. :9906 |
| ISSN: | 1477-9234 1477-9226 |
| Popis: | A series of magnesium complexes have been prepared and characterized, in which [(EDBP-Me)Mg(mu-OBn)](2) (4) has shown high activity toward the ring-opening polymerization (ROP) of epsilon-caprolactone and L-lactide. 2,2'-Ethylidene-bis(4,6-di-tert-butylphenol)-monomethyl ether ([EDBP-(Me)H]) is prepared by the reaction of 2,2'-ethylidene-bis(4,6-di-tert-butylphenol) (EDBP-H(2)) with dimethyl sulfate. The reaction of [EDBP-(Me)H] with (n)Bu(2)Mg yields [(EDBP-Me)Mg(n)Bu](2), which further reacts with benzyl alcohol and N,N-dimethylethylenediamine giving complexes [(EDBP-Me)Mg(mu-OBn)](2) (4) and {[EDBP(Me)]Mg(mu-Me(2)NCH(2)CH(2)NH)}(2) (5), respectively. Experimental results indicate that the activity of complex 4 toward cyclic esters is higher than that of [(mu-EDBP)Mg](2)/(BnOH). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|