Stereospecific synthesis of methyl 2-amino-2,4-dideoxy-6S-deuterio-α-D-xylo-hexopyranoside and methyl 2-amino-2,4-dideoxy-6S-deuterio-4-propyl-α-d-glucopyranoside: Side chain conformation of the novel aminoglycoside antibiotic propylamycin
作者:Michael G. Pirrone、Takahiko Matsushita、Andrea Vasella、David Crich
DOI:10.1016/j.carres.2020.107984
日期:2020.5
The stereospecific syntheses of methyl 2-amino-2,4-dideoxy-4-C-propyl-α-d-glucopyranoside and of methyl 2-amino-2,4-dideoxy-α-D-xylo-hexopyranoside and of their 6S-deuterioisotopomers are described as models for ring I of the aminoglycoside antibiotics propylamycin and 4'-deoxyparomomycin, respectively. Analysis of the 1H NMR spectra of these compounds and of methyl 2-amino-2-deoxy-α-d-glucopyranoside
2-氨基-2,4-二脱氧-4-C-丙基-α-d-吡喃葡萄糖苷和甲基2-氨基-2,4-二脱氧-α-D-二甲苯基吡喃果糖苷及其6S的立体定向合成-氘代异位异构体分别被描述为氨基糖苷类抗生素丙基霉素和4'-脱氧巴龙霉素的I环模型。对这些化合物以及巴龙霉素本身的模型甲基2-氨基-2-脱氧-α-d-吡喃葡萄糖苷的1H NMR光谱进行分析,结果表明,在4位上既无脱氧反应,也没有取代CO取代基。通过CC键的4位显着改变了三种可能的交错构象之间侧链总体的分布。由此得出的结论是,对丙霉素中丙基的抗核糖体和抗菌活性的有益作用并非源于侧链构象的变化。而是暗示环氧的碱性增强和疏水性和/或溶剂化作用增强。