... Diastereoselective Synthesis of the Calicheamicin y1I Amino Sugar William R. Roush* and J. A. Hunt Department of Chemistry, Indiana University, Bloomington, Indiana 47405 Received October 10, 1994@ ... J. Org. Chem., Vol. 60, No. 4, 1995 799 Me 0 3,R=H Me - H 4 5 6 ...