Synthesis, surface active and antimicrobial properties of new alkyl 2,6-dideoxy-l-arabino-hexopyranosides
作者:Amélia P. Rauter、Susana Lucas、Tânia Almeida、Diana Sacoto、Verónica Ribeiro、Jorge Justino、Ana Neves、Filipa V.M. Silva、Maria C. Oliveira、Maria J. Ferreira、Maria-Soledade Santos、Ester Barbosa
DOI:10.1016/j.carres.2004.11.020
日期:2005.2
alpha-/beta-glycosides with sodium methoxide in methanol afforded the amphiphilic L-arabino-hexopyranosides in 94-99% yield. The surface tension at the air-water interface of the octyl L-glycosides and of the dodecyl alpha-L-glycoside aqueous solutions at 35 degrees C was measured with a du Nouy ring tensiometer and surface properties such as critical micelle concentration (CMC), relative surface excess, molecular
在三苯基膦催化下,1,5-脱水-2,6-二脱氧-L-阿拉伯糖基-己-1-烯醇与脂肪醇在二氯甲烷中的反应完成了烷基2,6-二脱氧-L-阿拉伯糖基己糖苷的合成。氢溴酸盐。与辛醇和十二烷醇反应,分别以50%和42%的收率得到相应的α-糖苷,以20%和21%的收率得到β-糖苷,以10%和9%的收率得到Ferrier产物的α-异头物。在甲醇中用甲醇钠对α-/β-糖苷进行脱乙酰作用,可得到两亲性L-阿拉伯糖基己吡喃糖苷,收率为94-99%。用du Nouy环张力计测量辛基L-糖苷和十二烷基α-L-糖苷水溶液在空气-水界面的表面张力和临界胶束浓度(CMC)等表面性能,评估了相对表面过量,界面处的分子面积和Gibbs胶束化自由能。六吡喃糖苷环在单体和聚集体中的立体化学与气-水界面上的疏水性和填充效率相关。使用纸盘扩散法评估表面活性糖苷的抗菌和抗真菌活性。十二烷基α-L-阿拉伯糖-己吡喃糖苷对蜡状芽孢杆菌和