Synthesis of ring-expanded homologs of 3-amino pyranosides

•The report details a new synthetic route to 3-amino septanosides starting from furanosyl amines.•Structures of 3R and 3S configured α- and β-septanosides were characterized by NMR spectroscopy.•Septanoside formation by glycosidation enables the attachment of reactivity handles onto the aglycone.•Propargyl 3-amino septanosides were derivatized by click cycloaddition reactions.