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Synthesis of amide ligands 7 and 8. Conditions: (a) 2N HCl, 84 %; (b) BnONH2, MeOH, 40°C, then NaBH3CN, HCl, MeOH, 79 %; (c) R(CH2)nCOCl, Et3N, CH2Cl2, 50–75 %; (d) H2, Pd/C, MeOH, 56–59 %; (e) i: TMSBr, CH2Cl2, ii: H2O, iii: NaOHaq, quant.
