Acetic Acid → 1-benzyl-7-[4-(2-butoxyethoxy)phenyl]-N-[4-[(S)-hydroxy-(1-oxidopyridin-1-ium-2-yl)methyl]phenyl]-2,3-dihydro-1-benzazepine-4-carboxamide

HRID 856430Notes

Reaction equation

HRID 856430 reaction equation
[CH2:1]([O:5][CH2:6][CH2:7][O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[CH:16]=[CH:17][C:18]3[NH:24][CH2:23][CH2:22][C:21]([C:25]([NH:27][C:28]4[CH:33]=[CH:32][C:31]([C@H:34]([OH:42])[C:35]5[CH:40]=[CH:39][CH:38]=[CH:37][N+:36]=5[O-:41])=[CH:30][CH:29]=4)=[O:26])=[CH:20][C:19]=3[CH:43]=2)=[CH:11][CH:10]=1)[CH2:2][CH2:3][CH3:4].[CH:44](=O)[C:45]1[CH:50]=[CH:49][CH:48]=[CH:47][CH:46]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(O)(=O)C>ClCCCl.O>[CH2:44]([N:24]1[C:18]2[CH:17]=[CH:16][C:15]([C:12]3[CH:11]=[CH:10][C:9]([O:8][CH2:7][CH2:6][O:5][CH2:1][CH2:2][CH2:3][CH3:4])=[CH:14][CH:13]=3)=[CH:43][C:19]=2[CH:20]=[C:21]([C:25]([NH:27][C:28]2[CH:29]=[CH:30][C:31]([C@H:34]([OH:42])[C:35]3[CH:40]=[CH:39][CH:38]=[CH:37][N+:36]=3[O-:41])=[CH:32][CH:33]=2)=[O:26])[CH2:22][CH2:23]1)[C:45]1[CH:50]=[CH:49][CH:48]=[CH:47][CH:46]=1

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 240Benzaldehyde2×HCID 5049666Sodium triacetoxyborohydride2×HCID 695213867-[4-(2-butoxyethoxy)phenyl]-N-[4-[(S)-hydroxy(1-oxidopyridin-2-yl)methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide

Product 1

HCID 30134161-benzyl-7-[4-(2-butoxyethoxy)phenyl]-N-[4-[(S)-hydroxy-(1-oxidopyridin-1-ium-2-yl)methyl]phenyl]-2,3-dihydro-1-benzazepine-4-carboxamideYield 72.7%

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 962WaterSolvent

Procedure

To a solution of 7-[4-(2-butoxyethoxy)phenyl]-N-[4-[(S)-hydroxy(1-oxidopyridin-2-yl)methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide (200 mg) and benzaldehyde (0.22 g) in 1,2-dichloroethane (10 ml) were added sodium triacetoxyborohydride (0.22 g) and acetic acid (1 droplet) at room temperature and the mixture was stirred for 24 hours. To the reaction solution were added benzaldehyde (0.22 g) and sodium triacetoxyborohydride (0.22 g), and the mixture was further stirred for 24 hours. To the reaction solution was added water and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over magnesium sulfate and concentrated under reduced pressure. The residue was separated and purified by column chromatography (ethanol:ethyl acetate 1:4) and further recrystallized from ethyl acetate-diisopropylether to give 1-benzyl-7-[4-(2-butoxyethoxy)phenyl]-N-[4-[(S)-hydroxy(1-oxidopyridin-2-yl)methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide (Compound 90) (168.0 mg) as yellow crystals.

Workup

  1. stirringthe mixture was further stirred for 24 hours
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with saturated brine
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was separated
  7. custompurified by column chromatography (ethanol:ethyl acetate 1:4)
  8. customfurther recrystallized from ethyl acetate-diisopropylether

Sources & evidence

ORD record
ord-3c72d1ea931c41958a1f7986c7cbd542
Source dataset
uspto-grants-2007_08
Patent number
US07262185B2

Reaction notes

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