A Cost-Effective, Column-Free Route to Ethylene Glycol Oligomers EG6, EG10, and EG12
作者:Bartosz Grzybowski、Chris Gothard
DOI:10.1055/s-0031-1289685
日期:2012.3
Although monodisperse ethylene glycol (EG) oligomers are important in a wide range of applications (ranging from drug therapeutics to materials science and engineering), their cost - especially for longer EG oligomers is often prohibitive. For example, decaethylene, EG10, and dodecaethylene, EG12, glycols cost hundreds of dollars per gram, and are only available from most vendors, including Sigma-Aldrich, in the polydispersed form. This high-cost is, in large part, due to laborious nature of synthesis and, above all, purification steps involved. Therefore, the motivation of our work was to design a cost-effective route to the EG oligomers that would altogether avoid the column-chromatography purification. This was achieved by a simple synthetic strategy, which combines bidirectional growth of the EG chains with the protection scheme using easy-to-remove trityl groups.
尽管单分散乙二醇(EG)低聚物在广泛的应用(从药物治疗到材料科学和工程)中非常重要,但其成本(尤其是较长的 EG 低聚物)往往令人望而却步。例如,十乙二醇(EG10)和十二乙二醇(EG12)的成本高达每克数百美元,而且只能从包括 Sigma-Aldrich 在内的大多数供应商处以多分散形式购得。这种高昂的成本在很大程度上是由于合成的费力,尤其是所涉及的纯化步骤。因此,我们工作的动机是设计出一种具有成本效益的 EG 低聚物路线,这种路线可以完全避免柱色谱纯化。我们采用了一种简单的合成策略,将 EG 链的双向生长与使用易于去除的三苯甲基基团的保护方案相结合,从而实现了这一目标。