[CH3:1][O:2][C:3](=[O:22])[CH2:4][N:5]1[C:13]2[C:8](=[CH:9][C:10]([O:14]CC3C=CC=CC=3)=[CH:11][CH:12]=2)[CH:7]=[CH:6]1>C(OCC)(=O)C.C(O)C.[Pd]>[CH3:1][O:2][C:3](=[O:22])[CH2:4][N:5]1[C:13]2[C:8](=[CH:9][C:10]([OH:14])=[CH:11][CH:12]=2)[CH:7]=[CH:6]1Compound 72A (18.9 g, 64 mmol) was dissolved in 100 ml 1:1 ethyl acetate/ethanol. 200 mg 10% Pd/C was added followed by purging with hydrogen. The reaction was stirred vigorously under balloon pressure for 16 h. The reaction was filtered through Celite® and concentrated to an oil which was filtered through 0.45 uM filter to give a pale yellow oil which crystallized on standing. MS m/z 206 (M+1).
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