Ethanol → HCID 23505941, compound

HRID 488846Notes

Reaction equation

HRID 488846 reaction equation
Br[C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][C:9]=1[O:10][C:11]([F:14])([F:13])[F:12])[CH:5]=[O:6].[CH3:15][C:16]1[C:17](B(O)O)=[CH:18][C:19]2[C:20](C)([CH3:28])[CH2:21][CH2:22][C:23]([CH3:27])([CH3:26])[C:24]=2[CH:25]=1.[CH2:33](O)C.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.C(OCC)(=O)C.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.O>[F:12][C:11]([F:14])([F:13])[O:10][C:9]1[CH:8]=[CH:7][C:4]([CH:5]=[O:6])=[CH:3][C:2]=1[C:17]1[C:16]([CH3:15])=[CH:25][C:24]2[C:23]([CH3:26])([CH3:27])[CH2:22][CH:21]([CH3:33])[CH:20]([CH3:28])[C:19]=2[CH:18]=1

Participants

9

Reactant 4

HCID 702EthanolHCID 11430Potassium CarbonateHCID 10037535(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)boronic acidHCID 131504163-Bromo-4-(trifluoromethoxy)benzaldehyde

Product 1

HCID 23505941HCID 23505941, compoundYield 76%

Reagents, catalysts & solvents 4

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 3-bromo-4-trifluoromethoxybenzaldehyde (10.0 g, 37.2 mmol), (3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl) boronic acid (11 g, 44.68 mmol, 1.2 eq) in a mixture of toluene (100 mL), ethanol (20 mL) and water (15 mL) was added potassium carbonate (10.28 g, 74.4 mmol, 2 eq). The solution was degassed with argon for 40 minutes. Tetrakis(triphenylphosphine)palladium(0) (0.86 g, 0.74 mmol, 0.02 eq) was added and the mixture heated at reflux under argon for 22 hours. The solution was cooled to room temperature, diluted with ethyl acetate and washed successively with water and brine, dried over MgSO4, filtered and evaporated. The residue was chromatographed on silica gel (silica: 70-230 mesh, 60A, 400 g, eluant: ethyl acetate/hexane, 5:95) to give 4-trifluoromethoxy-3-(3,5,5,8,7-pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl) benzaldehyde (11.1 g, 76%). 1H NMR (300 MHz; CDCl3) 1.25 (s, 6H); 1.32 (s, 6H); 1.70 (s, 4H); 2.08 (s, 3H); 7.06 (s, 1H); 7.18 (s, 1H); 7.48 (dd, J132 8.4 Hz, J2=1.5 Hz, 1H); 7.84 (d, J=2.0 Hz, 1H); 7.88 (dd, J1=2.0 Hz, J2=8.5 Hz 1H), 9.91 (s, 1H).

Workup

  1. customThe solution was degassed with argon for 40 minutes
  2. temperaturethe mixture heated
  3. temperatureat reflux under argon for 22 hours
  4. washwashed successively with water and brine
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. customevaporated
  8. customThe residue was chromatographed on silica gel (silica: 70-230 mesh, 60A, 400 g, eluant: ethyl acetate/hexane, 5:95)

Sources & evidence

ORD record
ord-35491f7c1920415da903ac9ed6d915e8
Source dataset
uspto-grants-2005_12
Patent number
US06974826B2

Reaction notes

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