Sodium Bicarbonate → Methyl 2-(2-aminophenyl)-3-cyclohexyl-1H-indole-6-carboxylate

HRID 1012229Notes

Reaction equation

HRID 1012229 reaction equation
Br[C:2]1[NH:3][C:4]2[C:9]([C:10]=1[CH:11]1[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1)=[CH:8][CH:7]=[C:6]([C:17]([O:19][CH3:20])=[O:18])[CH:5]=2.CC1(C)C(C)(C)OB([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][C:30]=2[NH2:35])O1.C(=O)([O-])O.[Na+]>COCCOC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:35][C:30]1[CH:31]=[CH:32][CH:33]=[CH:34][C:29]=1[C:2]1[NH:3][C:4]2[C:9]([C:10]=1[CH:11]1[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1)=[CH:8][CH:7]=[C:6]([C:17]([O:19][CH3:20])=[O:18])[CH:5]=2

Participants

7

Reactant 3

HCID 516892Sodium BicarbonateHCID 27346522-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)anilineHCID 11175076Methyl 2-bromo-3-cyclohexyl-1H-indole-6-carboxylate

Product 1

HCID 11995001Methyl 2-(2-aminophenyl)-3-cyclohexyl-1H-indole-6-carboxylateYield 96.4%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 80711,2-DimethoxyethaneSolvent

Procedure

To a suspension of methyl 2-bromo-3-cyclohexyl-1H-indole-6-carboxylate (6.50 g, 19.3 mmol) obtained in the same manner as in the method described in WO03/010140 and 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenylamine (5.08 g, 23.2 mmol) in 1,2-dimethoxyethane (90 ml) and water (45 ml) were added sodium hydrogen carbonate (4.81 g, 57.9 mmol) and tetrakis(triphenylphosphine)palladium (1.12 mg, 0.965 mmol), and the mixture was heated under reflux for 9 hr. The mixture was allowed to cool to room temperature, and water was added to the reaction mixture. The mixture was extracted with ethyl acetate and the organic layer was washed successively with saturated aqueous sodium hydrogen carbonate solution and saturated brine and dried over anhydrous magnesium sulfate. After filtration, the solvent was evaporated under reduced pressure. The residue was purified by silica gel chromatography (hexane:ethyl acetate=4:1-3:1) to give methyl 2-(2-aminophenyl)-3-cyclohexyl-1H-indole-6-carboxylate (6.48 g, yield 96%).

Workup

  1. customobtained in the same manner as in the method
  2. temperaturethe mixture was heated
  3. temperatureunder reflux for 9 hr
  4. extractionThe mixture was extracted with ethyl acetate
  5. washthe organic layer was washed successively with saturated aqueous sodium hydrogen carbonate solution and saturated brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. filtrationAfter filtration
  8. customthe solvent was evaporated under reduced pressure
  9. customThe residue was purified by silica gel chromatography (hexane:ethyl acetate=4:1-3:1)

Sources & evidence

ORD record
ord-bc0a831a850d4ed79536912a8d90912a
Source dataset
uspto-grants-2011_07
Patent number
US07977331B1

Reaction notes

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