Expanding the Scope of Aminosugars: Synthesis of 2‐Amino Septanosyl Glycoconjugates Using Septanosyl Fluoride Donors
作者:Jaideep Saha、Mark W. Peczuh
DOI:10.1002/chem.201003721
日期:2011.6.20
2‐Amino septanosyl fluorides were prepared from D‐glucose, D‐galactose, and D‐mannose. Other routes to the septanosyl glyconjugates, especially with regard to alternate donor types, were systematically investigated. Since routes to the individual donor types were being explored, factors that exert a controlling influence on the acid‐mediated cyclization of 1,6‐hydroxy‐aldehydes were determined. The newly
已经开发了一种通用策略,可以对天然氨基糖苷的复杂,环状扩展类似物进行立体控制合成。该方法的核心是在容易的和选择性的糖基化反应中利用Septanosyl氟化物作为糖基供体。事实证明,Septanosyl氟化物是糖基化反应的最佳选择,因为它们的可及性和糖苷配基的范围很广。此外,在糖基化中观察到高度的立体选择性,仅产生1,2-反式-糖苷。由D-葡萄糖,D-半乳糖和D制备2-氨基庚烷氟甘露糖。系统地研究了生成Septanosyl糖缀合物的其他途径,尤其是关于其他供体类型的途径。由于正在探索通往各个供体类型的途径,因此确定了对酸介导的1,6-羟基醛类环化有控制作用的因素。新制备的2-氨基庚烷糖基糖缀合物说明了反应的范围以及如何将其用于制备糖基化天然产物的其他环扩类似物。