First, the covalent bond between the leaving group (L) and the anomeric carbon
atom should possess a moderate thermal stability, because the use of an unstable glycosyl donor often results in difficulty in its handling as well as low reaction yields.
79) exhibited HMBC correlations with anomeric carbon
The presence of the PAE resin seems to greatly influence the relaxation of the anomeric carbon
, thereby yielding more of those species and longer relaxation times for the rapidly relaxing components.
It is also observed that the region above 100ppm is narrower and lower than in the spectra of the other two samples, which could be due to the change at its anomeric carbon
Electronegative substituents at the C-2 position of saturated heterocycles or at the anomeric carbon
of a pyranose ring favor the equatorial position much less than expected; often the axial position is favored.
Sucrose is a nonreducing disaccharide composed of glucose and fructose linked via their anomeric carbons
20) confirmed by two anomeric carbons