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。