The synthesis of L-aminosugar and the studies of L-pyranoses on the ring III of pyranmycins

[GRAPHICS] The synthesis of a novel class of aminoglycoside, pyranmycin, and a convenient method for the preparation of 6-amino-L-idopyranosides were reported. One of the members in the reported pyranmycin families, TC010, has prominent activity against Escherichia coli, Staphylococcus aureus, and Bacillus megaterium. We also discovered that the C-4(1) chair conformation on ring III of pyranmycin is essential for the antibacterial activity.