摘要
以葡萄糖为原料，经乙酰化、选择性脱C1位乙酰基、转化成三氯乙酰亚胺酯、与受体醇偶联和脱保护5步反应合成了11种不同碳链长度的烷基-β-D-吡喃葡萄糖苷。利用核磁共振、偏光显微镜和热失重分析法对其进行结构表征和性能测试。结果表明，当烷基-β-D-吡喃葡萄糖苷疏水烷基链长n为6—10时，均具有发泡和乳化性能，特别是正壬基β-D-吡喃葡萄糖苷（rt=9）具有更加优异的发泡和乳化性能；当烷基-β-D-吡喃葡萄糖苷疏水链的长度n／〉7时，均具有热致液晶行为，特别是正十二烷基-β-D-吡喃葡萄糖苷（n=12）和十四烷基-β-D-吡喃葡萄糖苷（n=14）能够形成更加稳定的液晶态。
Using D-glucose as precursor, eleven alkyl β-D-glucopyranosides with different carbon chain length were synthesized, via five consecutive steps including acetylation, selective deacetylation at the C1 position, conversion to trichloroacetimidate, coupling with acceptors alcohols and deprotection. Their structures and properties were characterized by NMR, polarization microscope （POM） and thermogravimetry （TG）. The results show that alkyl β-D-glucopyranosides possess foaming and emulsifying capacities for those with chain length of hydrophobic aglycon n = 6 - 10. Remarkably, n-nonyl β-D-glucopyranoside （ n = 9 ） shows even superior foaming and emulsifying capacities. Meanwhile, when the chain length of hydrophobic aglycon（n） is greater than 7, all alkyl β-D-glucopyranosides exhibit thermotropic liquid crystalline behavior. Among them, n-dodecyl β-D-glucopyranoside with n = 12 and n-tetradecyβ-D-glucopyranoside with n = 14 can form more stable liquid crystal state. Keywords glucose, alky β-D-glucopyranosides, foaming, emulsification, thermotropic liquid crystalline
出处
《应用化学》
CAS
CSCD
北大核心
2013年第10期1120-1126,共7页
Chinese Journal of Applied Chemistry
基金
湖南省自然科学基金资助项目(10JJ6023
05JJ40054)
湘潭大学第八批大学生创新基金研究项目(30)
博士科研启动费(05QDZ09)
关键词
葡萄糖
烷基-β-D-吡喃葡萄糖苷
发泡
乳化
热致液晶
glucose, alkyl β-D-glucopyranosides, foaming, emulsification, thermotropic liquid crystalline
