An efficient and highly stereoselective α(1→4) glycosylation between two d-galacturonic acid ester derivatives

Abstract The highly stereoselective α(1→4) coupling between two d -galacturonic acid ester derivatives was accomplished in good yields, for the first time, using a phenylthioglycoside as donor. The method was designed to prepare d -galacturonic acid oligomers with methyl ester groups in definite positions.