Transformation of Cellulose into Biodegradable Alkyl Glycosides by Following Two Different Chemical Routes
作者:Nicolas Villandier、Avelino Corma
DOI:10.1002/cssc.201000371
日期:2011.4.18
cellulose into long‐chain alkyl glycoside surfactants has been carried out following two different routes: (1) Direct transformation of cellulose to butyl‐, hexyl‐, octyl‐, decyl‐ and dodecyl‐α,β‐glycosides in an ionic liquid media and Amberlyst‐15Dry as catalysts, with mass yield of up to 82 %; and (2) two steps reaction with transformation of cellulose into methyl glucosides, with a procedure described
纤维素向长链烷基糖苷表面活性剂的转化已通过以下两种不同的途径进行:(1)纤维素在离子性离子中直接转化为丁基,己基,辛基,癸基和十二烷基-β-糖苷。液体介质和Amberlyst-15Dry作为催化剂,质量产率高达82%;(2)两步反应,按照Zhang等人的描述,将纤维素转化为甲基葡糖苷,然后在Amberlyst-15Dry存在下,用1-辛醇和1-癸醇进行缩醛化。使用1-辛醇对纤维素进行直接转化的动力学研究表明,在费歇尔糖苷化过程中,纤维素的解聚反应仍在继续。由于醇的亲脂性的增加(其减少了与碳水化合物的接触),增加了醇的链长会降低总体反应速率。最后,测试了几种酸催化剂,使用Amberlyst-15Dry获得了最佳结果。