[CH2:1]([NH:8][C:9](=[O:25])[CH:10]([NH:14]C(OCC1C=CC=CC=1)=O)[CH2:11][O:12][CH3:13])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1>CO.[Pd]>[CH2:1]([NH:8][C:9](=[O:25])[CH:10]([NH2:14])[CH2:11][O:12][CH3:13])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1To a solution of 12 (122.8 mg, 0.36 mmol) in methanol (2.0 mL) was added 10% Pd—C (11 mg) and the mixture stirred at room temperature in the presence of H2 gas for 75 min. Celite was added to the reaction mixture and the catalyst was removed by filtration. The clear filtrate was evaporated in vacuo to give pure 13 as a clear viscous oil (72 mg, 97%): Rf 0.30 (5% MeOH/CHCl3).
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