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Synthesis of the cone galactosylcalix[4]arenes 1. Reaction conditions: (i) DCC, DMAP, CH2Cl2, under reflux, 5 h, 44%; (ii) EDC, CH2Cl2/py (7:3), rt, 18 h, 66%; (iii) CuSO4·5H2O, Na-ascorbate, DMF/H2O, μW (150 W), 80 °C, 20 min, 83%; (iv) CH3ONa, CH3OH, rt, 1 h – IR120/H+, rt, 30 min, quantitative.
