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Synthesis of heterotelechelic poly(ethylene glycol)s and their characterization by MALDI-TOF-MS

✍ Scribed by Nicolas Hans Völcker; Doris Klee; Martin Hanna; Hartwig Höcker; Jordi J. Bou; Antxon Martínez de Ilarduya; Sebastián Muñoz-Guerra

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
150 KB
Volume
200
Category
Article
ISSN
1022-1352

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✦ Synopsis

Two heterotelechelic poly(ethylene glycol)s were synthezised by end group modification of ahydro-x-hydroxy-poly(oxyethylene) (PEG). The first reaction route starts from heterobifunctional a-hydrox-octadecanoyloxy-poly(oxyethylene) (400) and comprises the synthesis of a-hydro-x-carboxymethoxypoly(oxyethylene). The second pathway starts from homotelechelic PEG(400) and leads to a-(2-propenyl)-xcarboxymethylthio-poly(oxyethylene). Purification of the desired products was accomplished by means of ion exchange chromatography on DEAE Sephadex. PEG derivatives were characterized by means of NMR, IR, HPLC and GPC. MALDI-TOF-MS recorded in the reflectron mode served as a fine method that provides information on chemical composition as well as molecular weight.

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