[CH2:1]([O:8][C:9]([NH:11][C:12]1[C:13]([F:41])=[C:14]([C:18]2[C:30]3[C:29]4[C:24](=[CH:25][C:26]([O:31][CH2:32][CH2:33][O:34][CH3:35])=[CH:27][CH:28]=4)[NH:23][C:22]=3[C:21]([C:36]([O:38]CC)=[O:37])=[N:20][CH:19]=2)[CH:15]=[CH:16][CH:17]=1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.O[Li].O>C1COCC1.CO.O>[CH2:1]([O:8][C:9]([NH:11][C:12]1[C:13]([F:41])=[C:14]([C:18]2[C:30]3[C:29]4[C:24](=[CH:25][C:26]([O:31][CH2:32][CH2:33][O:34][CH3:35])=[CH:27][CH:28]=4)[NH:23][C:22]=3[C:21]([C:36]([OH:38])=[O:37])=[N:20][CH:19]=2)[CH:15]=[CH:16][CH:17]=1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1To a light orange, homogeneous solution of ethyl 4-(3-(benzyloxycarbonylamino)-2-fluorophenyl)-7-(2-methoxyethoxy)-9H-pyrido[3,4-b]indole-1-carboxylate (0.8002 g, 1.435 mmol) in THF (30.8 mL) and MeOH (10.25 mL) was added a solution of LiOH hydrate (0.241 g, 5.74 mmol) in water (2 mL). After 1.5 hr. the reaction was concentrated in vacuo. Water (10 mL) was added followed by 1 N aqueous HCl to pH 4-5 by litmus paper. The precipitate was filtered and washed with water, dried over Drierite under vacuum to give the desired product (0.705 g, 1.331 mmol, 93% yield) as a tan solid.
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