Significant Substituent Effect on the Anomerization of Pyranosides: Mechanism of Anomerization and Synthesis of a 1,2-<i>cis</i>Glucosamine Oligomer from the 1,2-<i>trans</i>Anomer
作者:Shino Manabe、Hiroko Satoh、Jürg Hutter、Hans Peter Lüthi、Teodoro Laino、Yukishige Ito
DOI:10.1002/chem.201303474
日期:2014.1.3
Aminoglycosides containing a 2,3‐trans carbamate group easily undergo anomerization from the 1,2‐trans glycoside to the 1,2‐cis isomer under mild acidic conditions. The N‐substituent of the carbamate has a significant effect on the anomerization reaction; in particular, an N‐acetyl group facilitated rapid and complete α‐anomerization. The differences in reactivity due to the various N‐substituents were