Choi, Ji Sik Simanjuntaka, Fidelis Stefanus Hubertson Oh, Ji Young Lee, Keun Im Lee, Sang Deuk Cheong, Minserk Kim, Hoon Sik Lee, Hyunjoo 2024-01-20T13:04:30Z 2024-01-20T13:04:30Z 2021-09-01 2013-01 0021-9517 https://pubs.kist.re.kr/handle/201004/128496 Decarboxylation of glycerol carbonate (GLC) to produce 2,3-epoxy-1-propanol (glycidol) was conducted using various kinds of ionic liquids (ILs) as catalysts. ILs bearing an anion with medium hydrogen-bond basicity such as NO3- and I- exhibited the higher glycidol yields than those having an anion with low or strong hydrogen-bond. FT-IR spectroscopic analysis shows that both GLC and glycidol interact with anions of ILs through their hydroxyl groups. It was possible to improve the yield of glycidol when a zinc salt with a medium Lewis acidity was co-present along with an IL. The yield of glycidol was greatly increased up to 98% when the decarboxylation was conducted in the presence of a high-boiling aprotic solvent. Computational calculations on the mechanism using 1-butyl-3-methylimidazolium nitrate as a catalyst revealed that the first step is the NO3--assisted ring-opening of GLC followed by the ring closure, resulting in the formation of a 3-membered ring intermediate species. (c) 2012 Elsevier Inc. All rights reserved. English ACADEMIC PRESS INC ELSEVIER SCIENCE PROPYLENE-OXIDE Ionic-liquid-catalyzed decarboxylation of glycerol carbonate to glycidol Article 10.1016/j.jcat.2012.10.015 1 JOURNAL OF CATALYSIS, v.297, pp.248 - 255 JOURNAL OF CATALYSIS 297 248 255 scie scopus 000314136500027 2-s2.0-84870865145 Chemistry, Physical Engineering, Chemical Chemistry Engineering Article PROPYLENE-OXIDE Glycerol Glycerol carbonate Glycidol Ionic liquids Decarboxylation