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

HRID 8095Notes

Reaction equation

HRID 8095 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(N(CC)CC)C.[F:37][C:38]([F:53])([F:52])[C:39]1[CH:44]=[C:43]([C:45]([F:48])([F:47])[F:46])[CH:42]=[CH:41][C:40]=1B(O)O>CN(C)C=O.[Cl-].[Na+].O.C(OCC)(=O)C.[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:40]3[CH:41]=[CH:42][C:43]([C:45]([F:48])([F:46])[F:47])=[CH:44][C:39]=3[C:38]([F:37])([F:52])[F:53])[CH:16]=[CH:17][CH:18]=2)[NH:13][CH:12]=1)([CH3:3])([CH3:2])[CH3:4]

Participants

8

Reactant 3

HCID 8471TriethylamineHCID 27826672,4-Bis(trifluoromethyl)phenylboronic acidHCID 86595245trifluoro-methanesulfonic acid 3-(2-tert-butoxycarbonylamino-2-methyl-propyl)-1H-indol-7-yl ester

Product 1

HCID 86595246{2-[7-(2,4-Bis-trifluoromethyl-phenyl)-1H-indol-3-yl]-1,1-dimethyl-ethyl}-carbamic acid tert-butyl esterYield 89.2%

Reagents, catalysts & solvents 4

HCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolventHCID 57417360Sodium chloride; waterSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of trifluoro-methanesulfonic acid 3-(2-tert-butoxycarbonylamino-2-methyl-propyl)-1H-indol-7-yl ester (262 mg, 0.600 mmol) in dimethylformamide (3.5 mL) is added triethylamine (0.11 mL, 0.780 mmol), tetrakis(triphenylphosphine)-palladium (28 mg, 0.0240 mmol) and 2,4-bistrifluoromethylbenzeneboronic acid (201 mg, 0.780 mmol). The mixture is heated to 100° C. for 20 hours, then cooled, diluted with brine and ethyl acetate. The organics are washed seven times with brine then dried over anhydrous sodium sulfate, filtered and evaporated in vacuo. The residue is purified using silica gel chromatography (hexane/20% ethyl acetate, hexane gradient elution) to give 268 mg of {2-[7-(2,4-Bis-trifluoromethyl-phenyl)-1H-indol-3-yl]-1,1-dimethyl-ethyl}-carbamic acid tert-butyl ester (89%). FDMS m/e=501 (M++1).

Workup

  1. temperaturecooled
  2. washThe organics are washed seven times with brine
  3. dry with materialthen dried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. customevaporated in vacuo
  6. customThe residue is purified
  7. washsilica gel chromatography (hexane/20% ethyl acetate, hexane gradient elution)

Sources & evidence

ORD record
ord-343aac3f52b94d84a607d6578897d0f3
Source dataset
uspto-grants-2006_08
Patent number
US07087635B2

Reaction notes

Loading…