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Synthesis of ellagic acid glycosides. (a) TBSCl, Im, DMAP, CH2Cl2/DMF, 50°C, 36 h, 71%; (b) TASF, CH2Cl2, room temperature, 10 min; then glycosyl donor, Bu4NI (xyloside only), reflux, 48 h, 13–15%. (c) (1) K2CO3, DMF/H2O; (2) K2CO3, MeOH/H2O, 86–92%.
