[C:1]([NH:8][N:9]1[C:15](=[O:16])[CH2:14][C:13]2[CH:17]=[CH:18][CH:19]=[CH:20][C:12]=2[C:11]2[CH:21]=[CH:22][CH:23]=[CH:24][C:10]1=2)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].[C:25]([O-:28])([O-])=O.[Cs+].[Cs+].[C:31]([O:34][CH2:35]Br)(=O)C>CN(C=O)C.C(Cl)Cl>[C:1]([NH:8][N:9]1[C:15](=[O:16])[CH:14]([C:25](=[O:28])[CH2:31][O:34][CH3:35])[C:13]2[CH:17]=[CH:18][CH:19]=[CH:20][C:12]=2[C:11]2[CH:21]=[CH:22][CH:23]=[CH:24][C:10]1=2)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2]A solution of 5-(N-Boc-amino)-5,7-dihydro-6H-dibenz[b,d]azepin-6-one (1.03, 3.08 mmol) (Example 7-E) in DMF was treated with Cs2CO3 (1.10 g, 3.39 mmol) and warmed to 60° C. To the reaction mixture was added bromomethyl acetate (0.321 ml, 3.39 mmol) (Aldrich) and stirring continued for 17 h. After cooling to 23° C. the mixture was diluted with CH2Cl2, washed with several portions of brine and dried over Na2SO4. The title compound was purified by chromatography (SiO2, CHCl3).
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