TY - JOUR A1 - Fleischmann, Carolin A1 - Wöhlk, Hendrik A1 - Ritter, Helmut T1 - End group functionalization of poly(ethylene glycol) with phenolphthalein: towards star-shaped polymers based on supramolecular interactions JF - Beilstein Journal of Organic Chemistry PY - 2014/// VL - 10 SP - 2263 EP - 2269 SN - 1860-5397 DO - 10.3762/bjoc.10.235 PB - Beilstein-Institut JA - Beilstein J. Org. Chem. UR - https://doi.org/10.3762/bjoc.10.235 KW - cyclodextrin KW - phenolphthalein KW - poly(ethylene glycol) KW - supramolecular assembly KW - UV–vis spectroscopy N2 - The synthesis of a new phenolphthalein azide derivative, which can be easily utilized in polymer analogous reactions, is presented. The subsequent cycloaddition reaction with propargyl-functionalized methoxypoly(ethylene glycol) yielded polymers bearing phenolphthalein as the covalently attached end group. In presence of per-β-cyclodextrin-dipentaerythritol, the formation of stable inclusion complexes was observed, representing an interesting approach towards the formation of star shaped polymers. The decolorization of a basic polymer solution caused by the complexation was of great advantage since this behavior enabled following the complex formation by UV–vis spectroscopy and even the naked eye. ER -