CuAAC click chemistry with N-propargyl 1,5-dideoxy-1,5-imino-D-gulitol and N-propargyl 1,6-dideoxy-1,6-imino-D-mannitol provides access to triazole-linked piperidine and azepane pseudo-disaccharide iminosugars displaying glycosidase inhibitory properties
作者:Luís Otávio B. Zamoner、Valquíria Aragão-Leoneti、Susimaire P. Mantoani、Michael D. Rugen、Sergey A. Nepogodiev、Robert A. Field、Ivone Carvalho
DOI:10.1016/j.carres.2016.04.020
日期:2016.6
separable mix of piperidine N-propargyl 1,5-dideoxy-1,5-imino-D-gulitol and azepane N-propargyl 1,6-dideoxy-1,6-imino-D-mannitol. In O-acetylated form, these two building blocks were subjected to CuAAC click chemistry with a panel of three differently azide-substituted glucose building blocks, producing iminosugar pseudo-disaccharides in good yield. The overall panel of eight compounds, plus 1-deoxynojirimycin
1,2:5,6-二脱水-D-甘露糖醇的无保护基合成,然后用炔丙基胺开环,随后闭环产生哌啶N-炔丙基1,5-二甲氧基-1,5的可分离混合物-亚氨基-D-古洛糖醇和氮杂环庚烷N-炔丙基1,6-二脱氧-1,6-亚氨基-D-甘露糖醇。以O-乙酰化形式,将这两个结构单元与一组三个不同的叠氮化物取代的葡萄糖结构单元进行CuAAC点击化学反应,以高收率生产亚氨基糖假二糖。评估了八种化合物的总含量,再加上1-脱氧野rim霉素(DNJ)作为基准,被评估为杏仁β-葡萄糖苷酶,酵母α-葡萄糖苷酶和大麦β-淀粉酶的前瞻性抑制剂。亚氨基糖假二糖对杏仁β-葡萄糖苷酶没有抑制活性,而母体N-炔丙基1,5-二脱氧-1,同样证明5-亚氨基-D-古洛糖醇和N-炔丙基1,6-二脱氧-1,6-亚氨基-D-甘露糖醇对酵母α-葡糖苷酶无活性。在以前的系列中,可以通过在氮上进行适当的取代来恢复其抑制活性。哌啶的更大活性可以基于对接研究