246832-22-4Relevant academic research and scientific papers
A cost-effective, column-free route to ethylene glycol oligomers EG 6, EG10, and EG12
Gothard, Chris M.,Grzybowski, Bartosz A.
, p. 717 - 722 (2012)
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. Georg Thieme Verlag Stuttgart · New York.
Convenient multigram synthesis of monodisperse oligo(ethylene glycols): Effective reaction monitoring by infrared spectroscopy using an attenuated total reflection fibre optic probe
Lumpi, Daniel,Braunshier, Christian,Hametner, Christian,Horkel, Ernst,Zachhuber, Bernhard,Lendl, Bernhard,Fr?hlich, Johannes
supporting information; experimental part, p. 6469 - 6471 (2011/02/23)
A convenient approach for the synthesis of monodisperse oligo(ethylene glycols) up to 12 units is described. A novel cleavage protocol replacing laborious hydrogenolysis is introduced to achieve a fast, inexpensive and widely applicable procedure. In addition to the synthetic part, Fourier transform infrared (FTIR) spectroscopy using a fibre optic attenuated total reflection (ATR) sensor was applied to monitor the formation of sensitive key intermediates, resulting in optimized reaction times. By applying this in-line technique, the possibility of real-time analysis under inert conditions was impressively demonstrated.
