Studies on Sialic Acids. XXX. Synthesis of 2,7-Anhydrosialic Acid.
作者:Kimio FURUHATA、Haruo OGURA
DOI:10.1248/cpb.40.3197
日期:——
N-Acetyl-and N-glycolyl-2, 7-anhydroneuraminic acid were synthesized from methyl 5-acetamido-3, 5-dideoxy-2-thio-α-D-glycero-D-galacto-2-nonulopyranosonate in high yield. The structures and stereochemistry of these glycosanic sialic acids were elucidated from 1H-NMR spectra and X-ray crystal analysis. The ring systems of N-acetyl- and N-glycolyl-2, 7-anhydroneuraminic acid (1 and 10) were determined to have the same 2C5(D) conformation.
以 5-acetamido-3, 5-dideoxy-2-thio-α-D-glycero-D-galacto-2-nonulopyranosonate 甲酯为原料,高产率合成了 N-乙酰基-和 N-乙醇酰基-2, 7-脱水神经氨酸。通过 1H-NMR 谱和 X 射线晶体分析阐明了这些聚糖唾液酸的结构和立体化学。 N-乙酰基-和N-乙醇酰-2, 7-脱水神经氨酸(1和10)的环系统被确定具有相同的2C5(D)构象。