Hydrochloric Acid → methyl 3-cyclohexyl-2-[2-(2-hydroxyethoxy)-3-nitrophenyl]-1H-indole-6-carboxylate

HRID 1012332Notes

Reaction equation

HRID 1012332 reaction equation
[CH:1]1([C:7]2[C:15]3[C:10](=[CH:11][C:12]([C:16]([O:18][CH3:19])=[O:17])=[CH:13][CH:14]=3)[NH:9][C:8]=2[C:20]2[CH:25]=[CH:24][CH:23]=[C:22]([N+:26]([O-:28])=[O:27])[C:21]=2[O:29][CH2:30][CH2:31][O:32]C2CCCCO2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.Cl.[OH-].[Na+].C(=O)([O-])O.[Na+]>O1CCCC1.CO>[CH:1]1([C:7]2[C:15]3[C:10](=[CH:11][C:12]([C:16]([O:18][CH3:19])=[O:17])=[CH:13][CH:14]=3)[NH:9][C:8]=2[C:20]2[CH:25]=[CH:24][CH:23]=[C:22]([N+:26]([O-:28])=[O:27])[C:21]=2[O:29][CH2:30][CH2:31][OH:32])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 516892Sodium BicarbonateHCID 23152551methyl 3-cyclohexyl-2-{3-nitro-2-[2-(tetrahydropyran-2-yloxy)ethoxy]phenyl}-1H-indole-6-carboxylate

Product 1

HCID 23152792methyl 3-cyclohexyl-2-[2-(2-hydroxyethoxy)-3-nitrophenyl]-1H-indole-6-carboxylateYield 134.9%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of methyl 3-cyclohexyl-2-{3-nitro-2-[2-(tetrahydropyran-2-yloxy)ethoxy]phenyl}-1H-indole-6-carboxylate (6.48 g, 18.6 mmol) in tetrahydrofuran (30 ml) and methanol (90 ml) was added 6N hydrochloric acid (15 ml), and the mixture was stirred at room temperature for 1 hr. The reaction mixture was neutralized with 4N aqueous sodium hydroxide solution (22.5 ml), saturated aqueous sodium hydrogen carbonate solution was added, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate. After filtration, the solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (hexane:ethyl acetate=3:1-2:1) to give methyl 3-cyclohexyl-2-[2-(2-hydroxyethoxy)-3-nitrophenyl]-1H-indole-6-carboxylate (11.00 g, yield 91%).

Workup

  1. additionwas added
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with saturated brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationAfter filtration
  6. customthe solvent was evaporated under reduced pressure
  7. customthe residue was purified by silica gel chromatography (hexane:ethyl acetate=3:1-2:1)

Sources & evidence

ORD record
ord-4e33f55a777946e7b7e7f482899d6116
Source dataset
uspto-grants-2011_07
Patent number
US07977331B1

Reaction notes

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