A new type of sugar-amino acid hybrid is presented and comprises of a sugar unit (mono- or disaccharide) α- or β-linked through an S-glycosidic linkage to the α-position of an α,α-disubstituted β-amino acid unit. The synthetic strategy is based on an SN2 reaction between protected 1-thiosugars as nucleophiles and a hindered α-methylisoserine-derived sulfamidate as the chiral starting material.
amino acids - glycosylations - ring opening - steric hindrance - sulfur