Glycosidase inhibitors and methods of synthesizing same
申请人:Pinto Mario Brian
公开号:US20050065139A1
公开(公告)日:2005-03-24
A method for synthesizing Salacinol, its stereoisomers, and analogues, homologues and other derivatives thereof potentially useful as glycolsidase inhibitors. The compounds of the invention may have the general formula (I) or (II):
The synthetic schemes comprise reacting a cyclic sulfate with a 5-membered ring sugar containing a heteroatom (X). The heteroatom preferably comprises sulfur, selenium, or nitrogen. The cyclic sulfate and ring sugar reagents may be readily prepared from carbohydrate precursors, such as D-glucose, L-glucose, D-xylose and L-xylose. The target compounds are prepared by opening of the cyclic sulfates by nucleophilic attack of the heteroatoms on the 5-membered ring sugars. The resulting heterocyclic compounds have a stable, inner salt structure comprising a heteroatom cation and a sulfate anion. The synthetic schemes yield various stereoisomers of the target compounds in moderate to good yields with limited side-reactions.
Versatile synthesis of some analogues of the naturally-occurring α-glucosidase inhibitor salacinol (1), involving thioanhydro alditol moieties with erythro, d,l-threo, xylo, ribo, d-arabino and d-manno configurations is described. Nucleophilic attack at the least-hindered carbon atom of an l- or d-protected erythritol cyclic sulfate by the thioanhydro alditol sulfur atom yielded the desired zwitterionic
多功能天然存在的α葡萄糖苷酶抑制剂的Salacinol(的一些类似物的合成1),涉及thioanhydro糖醇部分具有赤式,d,1-苏式,木糖,核糖,D-阿糖和D-甘露配置进行说明。硫代脱水醛糖醇硫原子对1-或d-保护的赤藓糖醇环状硫酸盐的最少受阻碳原子的亲核攻击产生了所需的两性离子化合物。此外,2,4-的环硫酸酯的制备ø -亚苄基- d赤藓糖醇和2,4- ö-异亚丙基-1-赤藓糖醇得到改善。酶抑制试验表明,大多数新化合物是弱的但特异性抑制剂,而六元环类似物(β-葡萄糖苷酶:K i = 16μM)则具有良好的抑制活性。
Synthesis of Alkylated Deoxynojirimycin and 1,5-Dideoxy-1,5-iminoxylitol Analogues: Polar Side-Chain Modification, Sulfonium and Selenonium Heteroatom Variants, Conformational Analysis, and Evaluation as Glycosidase Inhibitors
作者:Monica G. Szczepina、Blair D. Johnston、Yue Yuan、Birte Svensson、B. Mario Pinto
DOI:10.1021/ja0482076
日期:2004.10.1
The syntheses of N-alkylated deoxynojirimycin and 1,5-dideoxy-1,5-iminoxylitol derivatives having either a D- or an L-erythritol-3-sulfate functionalized N-substituent are reported. The alkylating agent used was a cyclic sulfate derivative, whereby selective attack of the nitrogen atom at the least hindered primary center afforded the desired ammonium salt. In aqueous solution, these salts were configurationally