Sodium triacetoxyborohydride → HCID 178450548, compound

HRID 587070Notes

Reaction equation

HRID 587070 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]([O:27][CH3:28])=[O:26])=[CH:20][C:19]=3[CH:29]=2)=[CH:11][CH:10]=1)[CH2:2][CH2:3][CH3:4].[NH:30]1[C:34]([CH:35]=O)=[N:33][N:32]=[N:31]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl.C(O)(=O)C>[CH2:1]([O:5][CH2:6][CH2:7][O:8][C:9]1[CH:10]=[CH:11][C:12]([C:15]2[CH:16]=[CH:17][C:18]3[N:24]([CH2:35][C:34]4[NH:33][N:32]=[N:31][N:30]=4)[CH2:23][CH2:22][C:21]([C:25]([O:27][CH3:28])=[O:26])=[CH:20][C:19]=3[CH:29]=2)=[CH:13][CH:14]=1)[CH2:2][CH2:3][CH3:4]

Participants

6

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 22328987methyl 7-[4-(2-butoxyethoxy)phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxylateHCID 178520064HCID 178520064, compound

Product 1

HCID 178450548HCID 178450548, compoundYield 79.3%

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 176Acetic AcidSolvent

Conditions

Temperature
40 °C

Procedure

In 1,2-dichloroethane (14 ml)/acetic acid (7 ml) was dissolved methyl 7-[4-(2-butoxyethoxy)phenyl]-2,3-dihydro-1-benzazepine-4-carboxylate (0.70 g). To the solution were added tetrazole-5-carbaldehyde (0.31 g) and sodium triacetoxyborohydride (1.5 g), and the mixture was stirred at 40° C. for 18 hours. The mixture was cooled to room temperature, and the solvent was removed under reduced pressure. The resulting residue was added to water, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried with magnesium sulfate. The solvent was removed under reduced pressure, and the resulting residue was purified with silica gel column chromatography (ethyl acetate/ethanol=15:1) to give methyl 7-[4-(2-butoxyethoxy)phenyl]-1-(tetrazol-5-ylmethyl)-2,3-dihydro-1-benzazepine-4-carboxylate (0.67 g).

Workup

  1. temperatureThe mixture was cooled to room temperature
  2. customthe solvent was removed under reduced pressure
  3. additionThe resulting residue was added to water
  4. extractionthe mixture was extracted with ethyl acetate
  5. washThe extract was washed with saturated brine
  6. dry with materialdried with magnesium sulfate
  7. customThe solvent was removed under reduced pressure
  8. customthe resulting residue was purified with silica gel column chromatography (ethyl acetate/ethanol=15:1)

Sources & evidence

ORD record
ord-47f8e383ff964daabf9dccb92bbf3529
Source dataset
uspto-grants-2005_08
Patent number
US06936602B1

Reaction notes

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