Sodium borohydride → Ethyl 4-[(5,5-dimethyl-8-hydroxy-5,6,7,8-tetrahydronaphthalen-2-yl)azo]benzoate

HRID 1699318Notes

Reaction equation

HRID 1699318 reaction equation
[CH3:1][C:2]1([CH3:26])[CH2:11][CH2:10][C:9](=[O:12])[C:8]2[CH:7]=[C:6]([N:13]=[N:14][C:15]3[CH:25]=[CH:24][C:18]([C:19]([O:21][CH2:22][CH3:23])=[O:20])=[CH:17][CH:16]=3)[CH:5]=[CH:4][C:3]1=2.[BH4-].[Na+]>C1COCC1.CCO>[CH3:26][C:2]1([CH3:1])[CH2:11][CH2:10][CH:9]([OH:12])[C:8]2[CH:7]=[C:6]([N:13]=[N:14][C:15]3[CH:16]=[CH:17][C:18]([C:19]([O:21][CH2:22][CH3:23])=[O:20])=[CH:24][CH:25]=3)[CH:5]=[CH:4][C:3]1=2

Participants

5

Reactant 2

HCID 4311764Sodium borohydrideHCID 15462842Ethyl 4-[(5,6,7,8-tetrahydro-5,5-dimethyl-8-oxo-2-naphthalenyl)azo]-benzoate

Product 1

HCID 22571548Ethyl 4-[(5,5-dimethyl-8-hydroxy-5,6,7,8-tetrahydronaphthalen-2-yl)azo]benzoate

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of ethyl 4-[(5,5-dimethyl-5,6-dihydro-naphthalen-8(7H)-one-2-yl)azo]benzoate (Compound D10, 60 mg, 0.171 mmol) in 2 ml of THF and 7 ml of EtOH at 0° C. was added NaBH4 (6.5 mg, 0.171 mmol) and the mixture stirred for 3 h. The reaction was quenched by slow addition of cold water. Solvent was removed under reduced pressure and the residue was extracted with ethyl acetate. The organic layer was washed with brine, dried (MgSO4) and solvent removed under reduced pressure. The crude product was purified by flash chromatography (silica, ethyl acetate/hexane, 1:3) to afford the title compound as a red oil.

Workup

  1. customThe reaction was quenched by slow addition of cold water
  2. customSolvent was removed under reduced pressure
  3. extractionthe residue was extracted with ethyl acetate
  4. washThe organic layer was washed with brine
  5. dry with materialdried (MgSO4) and solvent
  6. customremoved under reduced pressure
  7. customThe crude product was purified by flash chromatography (silica, ethyl acetate/hexane, 1:3)

Sources & evidence

ORD record
ord-f2c9b2efa2ca403694d8579798bbfc38
Source dataset
uspto-grants-2002_02
Patent number
US06344561B2

Reaction notes

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