(2R,3S,4R,5R)-2-(Acetoxymethyl)-5-(((benzyloxy)carbonyl)amino)-6-((bis(benzyloxy)phosphaneyl)oxy)tetrahydro-2H-pyran-3,4-diyl Diacetate is an intermediate in the synthesis of α-D-Glucosamine 1-Phosphate (G515060), a phosphorylated glucosamine used in the enzymatic α-glucosaminylation of maltooligosaccharides catalyzed by phosphorylase.