[CH2:1]([O:3][C:4](=[O:39])[CH2:5][CH:6]([C:29]1[CH:38]=[N:37][C:36]2[C:31](=[CH:32][CH:33]=[CH:34][CH:35]=2)[N:30]=1)[CH:7]=[CH:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]1[CH:18]=[CH:17][CH:16]=[C:15]([NH:19][CH2:20][C:21]2[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][CH:22]=2)[N:14]=1)[CH3:2].C([O-])=O.[NH4+]>CCO.[Pd]>[CH2:1]([O:3][C:4](=[O:39])[CH2:5][CH:6]([C:29]1[CH:38]=[N:37][C:36]2[C:31](=[CH:32][CH:33]=[CH:34][CH:35]=2)[N:30]=1)[CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]1[CH:18]=[CH:17][CH:16]=[C:15]([NH:19][CH2:20][C:21]2[CH:22]=[CH:23][C:24]([O:27][CH3:28])=[CH:25][CH:26]=2)[N:14]=1)[CH3:2]A solution of the 22-4 (0.141 g, 0.268 mmol) in 25 mL absolute EtOH was treated with 10% Pd—C (0.015 g, 10% by wt) at room temperature under an argon atmosphere. Then ammonium formate (0.101 g, 1.61 mmol) was added and the heterogeneous mixture was refluxed for 30 minutes. The reaction was >50% complete (by ms). At this point, more Pd—C (0.008 g, 5% by wt) and NH4CO2 (0.050 g, 0.80 mmol) were added and the mixture refluxed for an additional 30 minutes (reaction complete by ms). The solution was then filtered through a Celite plug, washed with EtOH (75 mL), and concentrated in vacuo to afford 0.130 g 22-5.
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