A series of amphiphilic methyl glucopyranoside ethers incorporating various alkyl chain lengths has been synthesized from commercially available methyl glucopyranosides following an acetalisation/hydrogenolysis sequence. The amphiphilic properties of ethers and acetal intermediates were evaluated. Both families exhibit excellent surfactant properties with a maximum efficiency obtained for compounds
按照缩醛化/氢解顺序,已经从市售的甲基吡喃葡萄糖苷合成了一系列结合了各种烷基链长的两亲性甲基吡喃葡萄糖苷醚。评估了醚和乙缩醛中间体的两亲性。这两个家族均表现出优异的表面活性剂性能,对于带有线性十二烷基链的化合物(CMC = 0.012 mM,γsat。 = 30 mN m -1)具有最大的效率。抗菌活性研究表明,它对革兰氏阳性细菌(如单核细胞增生性李斯特菌,粪肠球菌,粪肠球菌和金黄色葡萄球菌)具有有效活性(0.03
Catalytic reductive cleavage of methyl α-<scp>d</scp>-glucoside acetals to ethers using hydrogen as a clean reductant
The palladium-catalysed reductive cleavage of methyl glucoside acetals has been studied using hydrogen as a clean reducing agent. The reaction proceeds at 120 °C in cyclopentyl methyl ether (CPME) without acid co-catalyst. Under these conditions, the corresponding methyl glucoside monoethers were obtained with poor to good isolated yields (37–81%) and high selectivities (86–99%).
The synthesis of various amphiphilic o-(n-alkyl)-D-glucopyranoses, having the long alkyl chain (C8H17 - C16H33) in 2-, 3-, 4- or 6-position are described. The investigations of the thermal behaviour of 6-o-(13a-e), 4-o-(14a-e), 3-o-(15a-e) and 2-o-(n-alkyl)-D-glucopyranoses (16a-e) and the corresponding methyl-alpha-D-glucosides 4a-e, 8a-e and 12a-e, respectively, are summarized in this paper.