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Synthesis of the cone lactosylcalix[4]arenes 3. Reaction conditions: (i) NaN3, n-Bu4NI, DMF, 90 °C, 24 h, 60%; (ii) CuSO4·5H2O, Na-ascorbate, DMF/H2O, μW (150 W), 80 °C, 40 min, 46%; (iii) CH3ONa, CH3OH, rt, 2 h – IR120/H+, rt, 30 min, 73%.
