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Preparation of the functionalized ligands 12 and 14.
Reagents and conditions: (a) Cu(I), NHEt3Cl, tBuOH/H2O, 60%; (b) NaN3, DMF, 62%; (c) CAN, CH3CN/H2O; (d) Amberlyst H+, MeOH/THF; (e) NaCN, DMF, 65%; (f) H2O2, NaOH, 52%; (g) AcOH, H2O, 78%.
