Polymer-supported oxidation of alcohols was conducted very efficiently by employing oxoammoniumsalts, the reactive intermediates in TEMPO oxidations (TEMPO=2,2,6,6-tetramethylpiperidinoxyl). These highly reactive salts (see scheme; X=Br, Cl) could be prepared and isolated on the polymeric support, and were used for the conversion of single compounds as well as of complex mixtures of alcohols.
通过使用氧铵盐(TEMPO氧化中的反应性中间体,TEMPO = 2,2,6,6-四甲基哌啶氧基),可以非常有效地进行聚合物支持的醇氧化反应。这些高反应性的盐(见方案; X = Br,Cl)可以在聚合物载体上制备和分离,并用于转化单一化合物以及醇的复杂混合物。
[EN] PROCESS FOR PREPARING COPOLYESTERS, COPOLYESTERS AND THEIR MEDICAL USES<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE COPOLYESTERS, COPOLYESTERS ET LEURS UTILISATIONS MÉDICALES
申请人:STICHTING DUTCH POLYMER INST
公开号:WO2012065745A1
公开(公告)日:2012-05-24
The invention relates to a copolymer from at least an unsaturated macrolactone A and a lactone B, wherein the lactone B is chosen from the group consisting of ε-caprolactone (CL), substituted lactones and lactones that contain one or more etherlinkages in the lactone ring. The invention further relates to porous structures of the biodegradable copolymer, which can be used for in example in medical applications.