摘要甲基α-d-甘露吡喃糖苷的合成的2、3、4和6一磷酸酯衍生物,甲基l-甘油-α-d-甘露糖吡喃糖苷的4-,6-和7-单磷酸酯衍生物和相应的磷酸乙醇胺衍生物和甲基l-甘油-α-d-芒果基七吡喃糖苷的6,7-环磷酸酯类似物用于研究在强碱性条件下(4 M KOH,120°C,18 h)的磷酸盐迁移和水解。通过1 H NMR光谱和电喷雾质谱分析所得产物。发现在这些条件下磷酸酯取代基是稳定的,除了庚糖7-磷酸酯(其产生大量的磷酸酯水解)以外,未观察到迁移或水解。
摘要甲基α-d-甘露吡喃糖苷的合成的2、3、4和6一磷酸酯衍生物,甲基l-甘油-α-d-甘露糖吡喃糖苷的4-,6-和7-单磷酸酯衍生物和相应的磷酸乙醇胺衍生物和甲基l-甘油-α-d-芒果基七吡喃糖苷的6,7-环磷酸酯类似物用于研究在强碱性条件下(4 M KOH,120°C,18 h)的磷酸盐迁移和水解。通过1 H NMR光谱和电喷雾质谱分析所得产物。发现在这些条件下磷酸酯取代基是稳定的,除了庚糖7-磷酸酯(其产生大量的磷酸酯水解)以外,未观察到迁移或水解。
From suitably protected methyl alpha-D-mannopyranosides five methyl L-glycero-alpha-D-manno-heptopyranosides were synthesized by the one-carbon-atom chain elongation at C-6 and converted to five monophosphates (1-5) having the PO(OH)(2) group at O-2, -3, -4, -6 and -7. Compounds 1-5 were exposed to acidic and basic hydrolytic conditions used in lipopolysaccharide analysis and the products and their proportion were determined. Under acidic conditions, besides hydrolysis of the glycoside, migrations and hydrolytic cleavage of the phosphate residue were found. Under basic conditions the phosphates were stable. (C) 1998 Elsevier Science Ltd. All rights reserved.