Access to <scp>l</scp>- and <scp>d</scp>-Iminosugar C-Glycosides from a <scp>d</scp>-<i>gluco</i>-Derived 6-Azidolactol Exploiting a Ring Isomerization/Alkylation Strategy
A flexible synthetic access to six-membered and D-iminosugar C-glycosides is reported starting from the easily available 6-azido-6-deoxy-2,3,4-tri-O-benzyl-D-glucopyranose precursor. This methodology involves a highly diastereoselective tandem ring enlargement/alkylation and a stereocontrolled ring contraction. It allows an efficient synthesis of iminosugar C-glycosides displaying structural diversity at both C-1 and C-6.
Synthesis, Conformational Analysis, and Complexation Study of an Iminosugar-Aza-Crown, a Sweet Chiral Cyclam Analog
A new family of chiral C2 symmetric tetraazamacrocycles, coined ISAC for IminoSugar Aza-Crown, incorporating two iminosugars adopting a 4C1 conformation is disclosed. Multinuclear NMR experiments on the corresponding Cd2+ complex show that the ISAC is a strong chelator in water and its tetramine cavity adopts a conformation similar to that of the parent Cd–cyclam complex. Similar behavior is observed
公开了一种新的手性C 2对称四氮杂大环族,其为IminoSugar Aza-Crown的ISAC,结合了两个采用4 C 1构象的亚氨基糖。在相应的Cd 2+络合物上进行的多核NMR实验表明,ISAC在水中是很强的螯合剂,其四胺腔具有与母体Cd–cyclam络合物相似的构象。在溶液中使用Cu 2+可以观察到类似的行为,与Cu–cyclam配合物相比,稳定性更高。