A mixture of phenylmethyl {(1S)-1-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-ylcarbonyl]-2,2-dimethylpropyl}carbamate (826 mg, 2.39 mmol), 5-phenyl-2-pyridinecarboxylic acid (500 mg, 2.5 mmol), EDC (550 mg, 2.87 mmol), HOBt (65 mg, 0.48 mmol), NMM (736 mg, 7.17 mmol) in CH2Cl2 (10 mL) was stirred at room temperature for 18 h. The reaction was diluted with water and CH2Cl2. The two layers were separated; the organic dried over anhydrous Na2SO4 and concentrated to give the title compound (1.3 g) as a pale brown oil. LCMS (m/z): 527.3 (M+H).
