Hydroxymethyl-Branched Piperidines from Hydroxymethyl-Branched Lactones: Synthesis and Biological Evaluation of 1,5-Dideoxy-2-C-hydroxymethyl-1,5-imino-D-mannitol, 1,5-Dideoxy-2-C-hydroxymethyl-1,5-imino-L-gulitol and 1,5-Dideoxy-2-C-hydroxymethyl-1,5-imi
作者:Raquel G. Soengas、Michela I. Simone、Stuart Hunter、Robert J. Nash、Emma L. Evinson、George W. J. Fleet
DOI:10.1002/ejoc.201200054
日期:2012.4
Three homochiral polyhydroxylated piperidines containing a quaternary carbon branch at C-2 of the heterocyclic ring, which can be considered as branched analogues of deoxymannorijimycin (DMJ), and their corresponding lactams were synthesised from readily available and versatile carbohydrate lactones containing a 2-C-hydroxymethyl branch. The key step in the synthesis of these iminosugars, 1,5-dideox
三个同手性多羟基化哌啶在杂环的 C-2 处含有季碳支链,可被视为脱氧甘露菌素 (DMJ) 的支链类似物,其相应的内酰胺是从含有 2-C-的易得且通用的碳水化合物内酯合成的羟甲基支链。合成这些亚氨基糖的关键步骤,1,5-dideoxy-2-C-hydroxymethyl-1,5-imino-D-mannitol, 1,5-dideoxy-2-C-hydroxymethyl-1,5-imino- L-gulitol 和 1,5-dideoxy-2-C-hydroxymethyl-1,5-imino-D-talitol 是一种有效的改良 Kiliani 反应,在容易获得的酮糖原料 L-山梨糖和 D-果糖上进行。在 C-2 处引入碳分支导致糖苷酶抑制活性的丧失,这可能有利于此类化合物如分子伴侣的治疗用途。