A novel synthesis of ethyl carbonate derivatives of β-cyclodextrin
摘要:
The carbonate ester derivatives of beta-cyclodextrin play a very important role in several fields, such as catalytic reaction and enantiomer separation. In this work, a novel synthesis process of the beta-cyclodextrin carbonate ester has been investigated through the reaction between beta-cyclodextrin and diethyl carbonate with anhydrous potassium carbonate as catalyst. The compounds were separated by semi-preparative chromatography and characterized by FT-IR, MS, H-1 NMR, and C-13 NMR spectroscopy. The position of the substituent was confirmed by C-13 NMR and this conclusion coincides with the analyses of MS and H-1 NMR in the main. The yield of the mono-6-O-ethoxycarbonyl beta-CD is 65.8%. (C) 2013 Elsevier Ltd. All rights reserved.