作者:Eric A. Voight、Christian Rein、Steven D. Burke
DOI:10.1021/jo0263014
日期:2002.11.1
Formal total syntheses of the naturally occurring deaminated sialic acids KDN (2), a potential oncofetal antigen, and N-acetylneuraminic acid (Neu5Ac, 1), the most naturally abundant sialic acid, have been accomplished in 46% and 9.3% overall yield, respectively, via a novel ketalization/ring-closing metathesis sequence. The rapid introduction of all oxygen and nitrogen functionality in a completely
天然的脱氨基唾液酸KDN(2)(一种潜在的胎粪抗原)和N-乙酰神经氨酸(Neu5Ac,1)(一种最天然的唾液酸)的形式总合成已经完成,总收率达到46%和9.3%,分别通过新颖的缩酮化/闭环复分解序列。以完全立体控制的方式快速引入所有氧和氮官能团,利用了刚性的6,8-二氧杂双环[3.2.1]辛-2-烯模板。2,7-脱水-KDN衍生物40在两种合成中均用作高级中间体。