Synthesis of pseudaminic acid, a unique nonulopyranoside derived from pathogenic bacteria through 6-deoxy-AltdiNAc
作者:Yong Joo Lee、Akemi Kubota、Akihiro Ishiwata、Yukishige Ito
DOI:10.1016/j.tetlet.2010.11.078
日期:2011.1
Chemical synthesis of pseudaminic acid is described. Starting from N-acetylglucosamine, deoxygenation and deoxyamination with stereo-inversion afforded 6-deoxy-AltdiNAc, which is the key intermediate for the biosynthesis of pseudaminic acid. Subsequently, the elongation reaction via In-mediated allylation of 6-deoxy-AltdiNAc with bromomethacrylate ester derivative followed by ozonolysis and hydrolysis
描述了伪氨基酸的化学合成。从N-乙酰基葡糖胺开始,通过立体转化进行脱氧和脱氧胺化反应,得到6-脱氧-AltdiNAc,其是伪氨基酸的生物合成的关键中间体。随后,通过6-脱氧-AltdiNAc与溴代甲基丙烯酸酯衍生物的In-介导的烯丙基化,然后进行臭氧分解和水解,进行延伸反应,得到了所需的伪氨基酸。此外,我们证明了用伪氨基酸的亚磷酸二苄基酯衍生物作为糖基供体进行糖基化以提供二糖。