A dramatic concentration effect on the stereoselectivity of N-glycosylation for the synthesis of 2′-deoxy-β-ribonucleosides

A dramatic concentration effect on the stereoselectivity of N-glycosylation, which is attributable to a low-concentration-facilitated remote-participation, has been disclosed, leading to convenient synthesis of the 2'-deoxy-beta-ribonucleosides of biological significance.