Synthesis of blockwise alkylated (1→4) linked trisaccharides as surfactants: influence of configuration of anomeric position on their surface activities
作者:Atsushi Nakagawa、Hiroshi Kamitakahara、Toshiyuki Takano
DOI:10.1016/j.carres.2011.04.034
日期:2011.9
alcoholysis of cellulose ethers and glycosylation of phenyl thio-cellobioside derivatives. Their surface activities in aqueous solution depended on their chemical structures: alpha- or beta-(1-->4) linkage between hydrophilic cellobiosyl and hydrophobic glucosyl blocks, methyl or ethyl groups of hydrophobic glucosyl block, and alpha- or beta-linked ether group at the C-1 of hydrophobic glucosyl block. The
29/71(16))是通过组合方法合成的,包括酸催化纤维素醚的醇解和苯基硫代纤维二糖苷衍生物的糖基化。它们在水溶液中的表面活性取决于它们的化学结构:亲水性纤维二糖基和疏水性葡萄糖基嵌段之间的α-或β-(1→4)键,疏水性葡萄糖基嵌段的甲基或乙基以及α-或β-连接的醚疏水性葡糖基嵌段的C-1处的基团。还研究了α-和β-糖苷对表面活性的混合作用。结果,乙基β-d-吡喃葡萄糖基-(1-> 4)-α-d-吡喃葡萄糖基-(1-> 4)-2,3,6-tri-O-ethyl-ta-d-吡喃葡萄糖苷7(GβGαEβ)具有最高的表面活性,化合物7的临界胶束浓度(CMC)和γ(CMC)(在CMC处的表面张力)值分别为0.5mM(约0.03wt%)和34.5mN / m。除化合物9和10外,α-糖苷和β-糖苷混合物的表面张力几乎等于纯化合物的表面张力。没有纯化过程的α-糖苷和β-糖苷混合物的合成比纯化合物更容易