NO Bond as a Glycosidic-Bond Surrogate: Synthetic Studies Toward Polyhydroxylated<i>N</i>-Alkoxypiperidines
作者:Gaëlle Malik、Angélique Ferry、Xavier Guinchard、Thierry Cresteil、David Crich
DOI:10.1002/chem.201202374
日期:2013.2.4
isofagomine, 3‐deoxyisofagomine, and numerous other N‐alkoxy analogues. The barrier to inversion in these polyhydroxylated N‐alkoxypiperidine derivatives was found by variable‐temperature NMR methods to be approximately 15 kcal mol−1. With the exception of N‐hydroxyisofagomine itself, none of the compounds prepared showed significant inhibitory activity against sweet almond β‐glucosidase.
通过将高度官能化的1,5-二醛与各种羟胺进行双环双还原胺化(DRA),合成了一系列新型的多羟基N-烷氧基哌啶。所需的基于糖的二醛是由环戊二烯化钠分七步高效制备的。已经为DRA开发了两步协议。脱保护后,它导致了异黄酮,3-脱氧异氟谷氨酸和许多其他N-烷氧基类似物。通过变温NMR方法发现这些多羟基化的N-烷氧基哌啶衍生物的转化障碍约为15 kcal mol -1。除了N-hydroxyisofagomine本身,所制备的化合物均未显示出对甜杏仁β-葡萄糖苷酶的显着抑制活性。