title: Synthesis of two β-cyclodextrin derivatives containing a vinyl group.
abstract: β-CD maleate (CDM) and β-CD itaconate (CDI) were prepared by esterification of β-cyclodextrin (β-CD) with maleic acid and itaconic acid using phosphate as a catalyst in a semi-dry process. The esterification of β-CD was carried out using [Itaconic acid ] or [Maleic acid ] 4 mol/mol of CD; M/L ratio 1:0.6; temperature 110 °C; [4-methoxyphenol] 2.5% amount of acid; reaction time 3.5h. The esterification rates of CDM and CDI are 70.38% and 21.02%, respectively. We found that CDM and CDI were both monoesters. Here, we also established a new evaluation method for the rate of esterification.
authors: The Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, 100193 Beijing, China; Key Opening Laboratory of Agricultural Products Processing and Quality Control, Ministry of Agriculture, Beijing 100193, China.
authors: Yong-Fu
authors: YF
authors: Li
authors: The Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, 100193 Beijing, China; Key Opening Laboratory of Agricultural Products Processing and Quality Control, Ministry of Agriculture, Beijing 100193, China. Electronic address: hayiming@sina.com.
authors: Yi-Ming
authors: YM
authors: Ha
authors: The Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, 100193 Beijing, China; Key Opening Laboratory of Agricultural Products Processing and Quality Control, Ministry of Agriculture, Beijing 100193, China.
authors: Qin
authors: Q
authors: Guo
authors: The Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, 100193 Beijing, China; Key Opening Laboratory of Agricultural Products Processing and Quality Control, Ministry of Agriculture, Beijing 100193, China.
authors: Qing-Peng
authors: QP
authors: Li
mesh_terms: D004951:Esterification; D009682:Magnetic Resonance Spectroscopy; D008298:Maleates / Q000737:chemistry; D015394:Molecular Structure; D013386:Succinates / Q000737:chemistry; D013818:Thermogravimetry; D047392:beta-Cyclodextrins / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D008298:Maleates; D013386:Succinates; D047392:beta-Cyclodextrins; C030272:maleic acid; C005229:itaconic acid
keywords: Cyclodextrin; Double bond content; Esterification; Vinyl group