No title
N-Acetylneuraminic acid (Neu5Ac) is the most common form of sialic acid, a nine-carbon sugar often situated at the ends of glycoconjugates. Its unique reactivity makes it a complex substrate to work on, but new methods are continuously developed. In 2007, Ye et.al. reported a regioselective substitution by morpholine on position 4 of fully acetylated Neu5Ac, with retained stereochemistry. The anom
