2-Oxo-D-gluconic acid obtained by fermentation of D-glucose was used as starting material for syntheses of amino acids. We trapped the carbohydrate in its furanoid configuration and synthesized an α- and an ω-amino acid. After deprotection of the hydroxyl groups the latter did not isomerize to the substituted piperidine (aza-sugar) as expected, but remained in the furanose form. The starting structure 2 was proven by crystal structure analysis. The conformational identification of the other substances was done by NMR measurements following known rules for furanoses.
通过D-葡萄糖的发酵获得的2-酮-D-葡萄糖酸被用作合成氨基酸的起始材料。我们将碳水化合物固定在其呋喃环构象中,并合成了α-和ω-氨基酸。在去保护羟基基团后,后者没有像预期的那样异构为取代的哌啶(杂环糖),而是保持呋喃糖形式。起始结构2通过晶体结构分析得到证实。其他物质的构象鉴定是通过NMR测量遵循呋喃糖已知规则完成的。