Sodium Carbonate → {1,1-dimethyl-2-[7-(4-trifluoromethyl-phenyl)-1H-indol-3-yl]-ethyl}-carbamic acid tert-butyl ester

HRID 8092

Reaction equation

HRID 8092 reaction equation
[C:1]([O:5][C:6]([NH:8][C:9]([CH3:29])([CH3:28])[CH2:10][C:11]1[C:19]2[C:14](=[C:15](OS(C(F)(F)F)(=O)=O)[CH:16]=[CH:17][CH:18]=2)[NH:13][CH:12]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[Na+].[Na+].[F:36][C:37]([F:48])([F:47])[C:38]1[CH:43]=[CH:42][C:41](B(O)O)=[CH:40][CH:39]=1>O1CCCC1.[Cl-].[Na+].O.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[C:1]([O:5][C:6](=[O:7])[NH:8][C:9]([CH3:29])([CH3:28])[CH2:10][C:11]1[C:19]2[C:14](=[C:15]([C:41]3[CH:42]=[CH:43][C:38]([C:37]([F:48])([F:47])[F:36])=[CH:39][CH:40]=3)[CH:16]=[CH:17][CH:18]=2)[NH:13][CH:12]=1)([CH3:2])([CH3:3])[CH3:4]

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 27343894-(Trifluoromethyl)phenylboronic acidHCID 86595245trifluoro-methanesulfonic acid 3-(2-tert-butoxycarbonylamino-2-methyl-propyl)-1H-indol-7-yl ester

Product 1

HCID 69517911{1,1-dimethyl-2-[7-(4-trifluoromethyl-phenyl)-1H-indol-3-yl]-ethyl}-carbamic acid tert-butyl esterYield 93.3%

Reagents, catalysts & solvents 3

HCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 8028TetrahydrofuranSolventHCID 57417360Sodium chloride; waterSolvent

Procedure

To a solution of trifluoro-methanesulfonic acid 3-(2-tert-butoxycarbonylamino-2-methyl-propyl)-1H-indol-7-yl ester (305 mg, 0.699 mmol) in tetrahydrofuran (4.5 mL) is added sodium carbonate (1 mL, 2M, 2 mmol), tetrakis(triphenylphosphine)-palladium (32 mg, 0.0280 mmol) and 4-trifluoromethylbenzeneboronic acid (0.1 99 g, 1.05 mmol). The mixture is refluxed for 22 hours, then cooled, diluted with brine and extracted three times with ethyl acetate. The combined organics are dried over anhydrous sodium sulfate, filtered and then evaporated in vacuo. The residue is purified using silica gel chromatography (hexane/20% ethyl acetate, hexane gradient elution) to give 282 mg of {1,1-dimethyl-2-[7-(4-trifluoromethyl-phenyl)-1 H-indol-3-yl]-ethyl}-carbamic acid tert-butyl ester (93%). FDMS m/e=433 (M++1).

Workup

  1. temperatureThe mixture is refluxed for 22 hours
  2. temperaturecooled
  3. extractionextracted three times with ethyl acetate
  4. dry with materialThe combined organics are dried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. customevaporated in vacuo
  7. customThe residue is purified
  8. washsilica gel chromatography (hexane/20% ethyl acetate, hexane gradient elution)

Sources & evidence

ORD record
ord-1bf2a222fc824b4c96663fff97db984b
Source dataset
uspto-grants-2006_08
Patent number
US07087635B2

Linked notes

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