A series of 1-amino-2, 5-anhydro-1-deoxyalditols, namely derivatives of 1-amino-2, 5- anhydro-1-deoxy-d-glucitol,-d-mannitol and-d-talitol was prepared from the corresponding 1- deoxy-1-trifluoroacetamidohexitols by treatment with anhydrous hydrogen fluoride. The reaction was also performed on 1, 3-dideoxy-1-trifluoroacetamido-d-ribo-hexitol and 1- deoxy-1-trifluoroacetamido-l-rhamnitol which both gave the expected C-2 inverted ...