In a first approach to a glycosylated version of ‘methyl β-acarviosin’, a putative inhibitor of cellulases, cellobiose was converted into a carbocyclic enone that could not be transformed into the required amine for a subsequent alkylation. Alternatively, methyl β-acarviosin itself was glycosylated at C4′, using a ‘glycosynthase’, to provide the ‘trisaccharide’ (and some ‘tetrasaccharide’). Both of these molecules were effective inhibitors of various cellulases. In a related approach to a regioisomer of the above ‘trisaccharide’, a selectively protected derivative of 1-epivalienamine was alkylated with a carbohydrate triflate to give a ‘disaccharide’ that could not be glycosylated to give the desired ‘trisaccharide’. Another unsuccessful approach to this molecule is also reported.
甲基 β-arviosin "是纤维素酶的一种假定抑制剂,在研究 "甲基 β-arviosin "糖基化版本的第一种方法中,纤维生物糖被转化为一种碳环烯酮,而这种碳环烯酮无法转化为后续烷基化所需的胺。另一种方法是使用 "糖合成酶 "在 C4′处对甲基 β-arviosin 本身进行糖基化,以提供 "三糖"(和一些 "四糖")。这两种分子都是各种纤维素酶的有效抑制剂。在研究上述 "三糖 "的异构体的相关方法中,1-表戊二烯胺的选择性保护衍生物与碳水化合物三酸酯发生烷基化反应,得到了一种 "二糖",但这种 "二糖 "不能通过糖基化反应得到所需的 "三糖"。报告中还提到了另一种处理该分子的失败方法。