[CH2:1]([C@H:8]([NH:43][C:44](=[O:50])[O:45][C:46]([CH3:49])([CH3:48])[CH3:47])[CH2:9][C@H:10]([OH:42])[C@@H:11]([N:27](CC1C=CC=CC=1)CC1C=CC=CC=1)[CH2:12][C:13]1[CH:18]=[CH:17][C:16]([O:19]CC2C=CC=CC=2)=[CH:15][CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([O-])=O.[NH4+]>C1COCC1.[Pd]>[NH2:27][C@@H:11]([CH2:12][C:13]1[CH:14]=[CH:15][C:16]([OH:19])=[CH:17][CH:18]=1)[C@@H:10]([OH:42])[CH2:9][C@@H:8]([NH:43][C:44](=[O:50])[O:45][C:46]([CH3:49])([CH3:48])[CH3:47])[CH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1A solution containing the product from Example 23E (12.3 g, 18.4 mmol) in THF (169 mL) was treated with 10% Pd on carbon (2.5 g) and ammonium formate (6.9 g, 109.4 mmol) and the mixture was heated at reflux for 1.5 hours. Additional 10% Pd on carbon (1.25 g) and NH4CO2H (3.45 g) were added and the mixture was heated at reflux for 2.5 hours. The reaction was concentrated and partitioned between chloroform and water and the solution was adjusted to pH 10 with NaHCO3 solution. The organic phase was washed with brine and dried over MgSO4, filtered and concentrated to give the title compound (6.1 g, 82% yield), which was used without further purification.
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