Preparation and Structure of Phosphono SugarN-Glycosides

Treatment of 1-phenyl-2-phospholene 1-oxide with N-bromoacetamide or bromine afforded threo and erythro bromohydrins, the latter being converted into novel N-glycosides by reaction with amines. The N-t-butyl phosphono sugar glycoside exists in the 2E conformation.