... To synthesize the β-glycoside of rebeccamycin, methods for stereospecifically forming β-glycoside of rebeccamycin derivatives are ... 6: 70%); (f) EtOH/toluene (1:3), 48% KOH, rt, overnight; then 10% citric acid; (g) N 2 H ... For the synthesis of 8 and 9 from 13 and 2-deoxy-3,4,6-tri-O ...